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Finding the Fourth Proportional to 531,330.12, 733,230.90 and 289,612.80

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Solution

The fourth proportional to 531,330.12, 733,230.90 and 289,612.80 is: 399,663.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    531,330.12 : 733,230.90 = 289,612.80 : x
  2. Step 2: Convert to fraction form
    531,330.12/733,230.90 = 289,612.80/x
  3. Step 3: Cross multiply
    531,330.12x = 733,230.90 × 289,612.80
  4. Step 4: Simplify right side
    531,330.12x = 212,353,053,995.52
  5. Step 5: Solve for x
    x = 212,353,053,995.52/531,330.12
  6. Step 6: Final answer
    x = 399,663.12

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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.