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Finding the Fourth Proportional to 626,375.21, 864,385.80 and 354,438.16

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Solution

The fourth proportional to 626,375.21, 864,385.80 and 354,438.16 is: 489,117.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    626,375.21 : 864,385.80 = 354,438.16 : x
  2. Step 2: Convert to fraction form
    626,375.21/864,385.80 = 354,438.16/x
  3. Step 3: Cross multiply
    626,375.21x = 864,385.80 × 354,438.16
  4. Step 4: Simplify right side
    626,375.21x = 306,371,308,160.20
  5. Step 5: Solve for x
    x = 306,371,308,160.20/626,375.21
  6. Step 6: Final answer
    x = 489,117.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.