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Finding the Fourth Proportional to 642,486.15, 885,203.51 and 424,307.39

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Solution

The fourth proportional to 642,486.15, 885,203.51 and 424,307.39 is: 584,601.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,486.15 : 885,203.51 = 424,307.39 : x
  2. Step 2: Convert to fraction form
    642,486.15/885,203.51 = 424,307.39/x
  3. Step 3: Cross multiply
    642,486.15x = 885,203.51 × 424,307.39
  4. Step 4: Simplify right side
    642,486.15x = 375,598,384,399.38
  5. Step 5: Solve for x
    x = 375,598,384,399.38/642,486.15
  6. Step 6: Final answer
    x = 584,601.53

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Half scale
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Double scale
Find fourth proportional to 642,487.15, 885,204.88 and 424,308.39
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.