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Finding the Fourth Proportional to 531,087.78, 732,891.87 and 289,372.35

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Solution

The fourth proportional to 531,087.78, 732,891.87 and 289,372.35 is: 399,328.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    531,087.78 : 732,891.87 = 289,372.35 : x
  2. Step 2: Convert to fraction form
    531,087.78/732,891.87 = 289,372.35/x
  3. Step 3: Cross multiply
    531,087.78x = 732,891.87 × 289,372.35
  4. Step 4: Simplify right side
    531,087.78x = 212,078,638,329.90
  5. Step 5: Solve for x
    x = 212,078,638,329.90/531,087.78
  6. Step 6: Final answer
    x = 399,328.79

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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.