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Finding the Fourth Proportional to 638,447.16, 955,980.99 and 385,389.39

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Solution

The fourth proportional to 638,447.16, 955,980.99 and 385,389.39 is: 577,064.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,447.16 : 955,980.99 = 385,389.39 : x
  2. Step 2: Convert to fraction form
    638,447.16/955,980.99 = 385,389.39/x
  3. Step 3: Cross multiply
    638,447.16x = 955,980.99 × 385,389.39
  4. Step 4: Simplify right side
    638,447.16x = 368,424,930,587.70
  5. Step 5: Solve for x
    x = 368,424,930,587.70/638,447.16
  6. Step 6: Final answer
    x = 577,064.09

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.