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Finding the Fourth Proportional to 509,057.73, 763,585.79 and 129,978.27

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Solution

The fourth proportional to 509,057.73, 763,585.79 and 129,978.27 is: 194,967.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,057.73 : 763,585.79 = 129,978.27 : x
  2. Step 2: Convert to fraction form
    509,057.73/763,585.79 = 129,978.27/x
  3. Step 3: Cross multiply
    509,057.73x = 763,585.79 × 129,978.27
  4. Step 4: Simplify right side
    509,057.73x = 99,249,559,330.89
  5. Step 5: Solve for x
    x = 99,249,559,330.89/509,057.73
  6. Step 6: Final answer
    x = 194,967.20

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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.