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Finding the Fourth Proportional to 509,641.20, 764,461.80 and 243,920.70

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Solution

The fourth proportional to 509,641.20, 764,461.80 and 243,920.70 is: 365,881.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,641.20 : 764,461.80 = 243,920.70 : x
  2. Step 2: Convert to fraction form
    509,641.20/764,461.80 = 243,920.70/x
  3. Step 3: Cross multiply
    509,641.20x = 764,461.80 × 243,920.70
  4. Step 4: Simplify right side
    509,641.20x = 186,468,057,379.26
  5. Step 5: Solve for x
    x = 186,468,057,379.26/509,641.20
  6. Step 6: Final answer
    x = 365,881.05

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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.