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Finding the Fourth Proportional to 261,646.60, 392,473.50 and 74,658.04

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Solution

The fourth proportional to 261,646.60, 392,473.50 and 74,658.04 is: 111,988.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,646.60 : 392,473.50 = 74,658.04 : x
  2. Step 2: Convert to fraction form
    261,646.60/392,473.50 = 74,658.04/x
  3. Step 3: Cross multiply
    261,646.60x = 392,473.50 × 74,658.04
  4. Step 4: Simplify right side
    261,646.60x = 29,301,302,261.94
  5. Step 5: Solve for x
    x = 29,301,302,261.94/261,646.60
  6. Step 6: Final answer
    x = 111,988.09

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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.