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Finding the Fourth Proportional to 650,439.28, 975,658.90 and 428,771.44

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Solution

The fourth proportional to 650,439.28, 975,658.90 and 428,771.44 is: 643,157.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    650,439.28 : 975,658.90 = 428,771.44 : x
  2. Step 2: Convert to fraction form
    650,439.28/975,658.90 = 428,771.44/x
  3. Step 3: Cross multiply
    650,439.28x = 975,658.90 × 428,771.44
  4. Step 4: Simplify right side
    650,439.28x = 418,334,671,501.82
  5. Step 5: Solve for x
    x = 418,334,671,501.82/650,439.28
  6. Step 6: Final answer
    x = 643,157.15

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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.