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Finding the Fourth Proportional to 321,641.60, 482,692.80 and 134,787.20

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Solution

The fourth proportional to 321,641.60, 482,692.80 and 134,787.20 is: 202,277.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,641.60 : 482,692.80 = 134,787.20 : x
  2. Step 2: Convert to fraction form
    321,641.60/482,692.80 = 134,787.20/x
  3. Step 3: Cross multiply
    321,641.60x = 482,692.80 × 134,787.20
  4. Step 4: Simplify right side
    321,641.60x = 65,060,810,972.16
  5. Step 5: Solve for x
    x = 65,060,810,972.16/321,641.60
  6. Step 6: Final answer
    x = 202,277.35

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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.