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Finding the Fourth Proportional to 639,701.61, 959,287.16 and 260,364.89

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Solution

The fourth proportional to 639,701.61, 959,287.16 and 260,364.89 is: 390,439.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,701.61 : 959,287.16 = 260,364.89 : x
  2. Step 2: Convert to fraction form
    639,701.61/959,287.16 = 260,364.89/x
  3. Step 3: Cross multiply
    639,701.61x = 959,287.16 × 260,364.89
  4. Step 4: Simplify right side
    639,701.61x = 249,764,689,793.55
  5. Step 5: Solve for x
    x = 249,764,689,793.55/639,701.61
  6. Step 6: Final answer
    x = 390,439.36

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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.