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Finding the Fourth Proportional to 647,612.40, 970,252.20 and 398,002.80

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Solution

The fourth proportional to 647,612.40, 970,252.20 and 398,002.80 is: 596,287.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,612.40 : 970,252.20 = 398,002.80 : x
  2. Step 2: Convert to fraction form
    647,612.40/970,252.20 = 398,002.80/x
  3. Step 3: Cross multiply
    647,612.40x = 970,252.20 × 398,002.80
  4. Step 4: Simplify right side
    647,612.40x = 386,163,092,306.16
  5. Step 5: Solve for x
    x = 386,163,092,306.16/647,612.40
  6. Step 6: Final answer
    x = 596,287.37

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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.