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Finding the Fourth Proportional to 432,221.40, 647,427.88 and 347,522.92

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Solution

The fourth proportional to 432,221.40, 647,427.88 and 347,522.92 is: 520,557.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    432,221.40 : 647,427.88 = 347,522.92 : x
  2. Step 2: Convert to fraction form
    432,221.40/647,427.88 = 347,522.92/x
  3. Step 3: Cross multiply
    432,221.40x = 647,427.88 × 347,522.92
  4. Step 4: Simplify right side
    432,221.40x = 224,996,027,347.01
  5. Step 5: Solve for x
    x = 224,996,027,347.01/432,221.40
  6. Step 6: Final answer
    x = 520,557.35

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1.5x scale

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.