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Finding the Fourth Proportional to 427,869.58, 640,858.34 and 292,613.10

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Solution

The fourth proportional to 427,869.58, 640,858.34 and 292,613.10 is: 438,272.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,869.58 : 640,858.34 = 292,613.10 : x
  2. Step 2: Convert to fraction form
    427,869.58/640,858.34 = 292,613.10/x
  3. Step 3: Cross multiply
    427,869.58x = 640,858.34 × 292,613.10
  4. Step 4: Simplify right side
    427,869.58x = 187,523,545,528.25
  5. Step 5: Solve for x
    x = 187,523,545,528.25/427,869.58
  6. Step 6: Final answer
    x = 438,272.68

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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.