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Finding the Fourth Proportional to 426,069.60, 639,099.72 and 292,542.72

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Solution

The fourth proportional to 426,069.60, 639,099.72 and 292,542.72 is: 438,810.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,069.60 : 639,099.72 = 292,542.72 : x
  2. Step 2: Convert to fraction form
    426,069.60/639,099.72 = 292,542.72/x
  3. Step 3: Cross multiply
    426,069.60x = 639,099.72 × 292,542.72
  4. Step 4: Simplify right side
    426,069.60x = 186,963,970,440.04
  5. Step 5: Solve for x
    x = 186,963,970,440.04/426,069.60
  6. Step 6: Final answer
    x = 438,810.87

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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.