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Finding the Fourth Proportional to 642,003.60, 963,005.40 and 310,227.60

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Solution

The fourth proportional to 642,003.60, 963,005.40 and 310,227.60 is: 465,341.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,003.60 : 963,005.40 = 310,227.60 : x
  2. Step 2: Convert to fraction form
    642,003.60/963,005.40 = 310,227.60/x
  3. Step 3: Cross multiply
    642,003.60x = 963,005.40 × 310,227.60
  4. Step 4: Simplify right side
    642,003.60x = 298,750,854,029.04
  5. Step 5: Solve for x
    x = 298,750,854,029.04/642,003.60
  6. Step 6: Final answer
    x = 465,341.40

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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.