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Finding the Fourth Proportional to 423,044.64, 634,569.12 and 142,564.32

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Solution

The fourth proportional to 423,044.64, 634,569.12 and 142,564.32 is: 213,847.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,044.64 : 634,569.12 = 142,564.32 : x
  2. Step 2: Convert to fraction form
    423,044.64/634,569.12 = 142,564.32/x
  3. Step 3: Cross multiply
    423,044.64x = 634,569.12 × 142,564.32
  4. Step 4: Simplify right side
    423,044.64x = 90,466,915,085.80
  5. Step 5: Solve for x
    x = 90,466,915,085.80/423,044.64
  6. Step 6: Final answer
    x = 213,847.21

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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.