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Finding the Fourth Proportional to 425,641.80, 638,070.60 and 144,963.84

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Solution

The fourth proportional to 425,641.80, 638,070.60 and 144,963.84 is: 217,312.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,641.80 : 638,070.60 = 144,963.84 : x
  2. Step 2: Convert to fraction form
    425,641.80/638,070.60 = 144,963.84/x
  3. Step 3: Cross multiply
    425,641.80x = 638,070.60 × 144,963.84
  4. Step 4: Simplify right side
    425,641.80x = 92,497,164,367.10
  5. Step 5: Solve for x
    x = 92,497,164,367.10/425,641.80
  6. Step 6: Final answer
    x = 217,312.22

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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.