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Finding the Fourth Proportional to 531,187.70, 733,039.08 and 289,470.20

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Solution

The fourth proportional to 531,187.70, 733,039.08 and 289,470.20 is: 399,468.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    531,187.70 : 733,039.08 = 289,470.20 : x
  2. Step 2: Convert to fraction form
    531,187.70/733,039.08 = 289,470.20/x
  3. Step 3: Cross multiply
    531,187.70x = 733,039.08 × 289,470.20
  4. Step 4: Simplify right side
    531,187.70x = 212,192,969,095.42
  5. Step 5: Solve for x
    x = 212,192,969,095.42/531,187.70
  6. Step 6: Final answer
    x = 399,468.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.