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Finding the Fourth Proportional to 385,502.60, 578,253.90 and 207,918.20

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Solution

The fourth proportional to 385,502.60, 578,253.90 and 207,918.20 is: 311,877.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,502.60 : 578,253.90 = 207,918.20 : x
  2. Step 2: Convert to fraction form
    385,502.60/578,253.90 = 207,918.20/x
  3. Step 3: Cross multiply
    385,502.60x = 578,253.90 × 207,918.20
  4. Step 4: Simplify right side
    385,502.60x = 120,229,510,030.98
  5. Step 5: Solve for x
    x = 120,229,510,030.98/385,502.60
  6. Step 6: Final answer
    x = 311,877.30

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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.