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Finding the Fourth Proportional to 639,287.20, 957,663.60 and 560,490.40

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Solution

The fourth proportional to 639,287.20, 957,663.60 and 560,490.40 is: 839,624.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,287.20 : 957,663.60 = 560,490.40 : x
  2. Step 2: Convert to fraction form
    639,287.20/957,663.60 = 560,490.40/x
  3. Step 3: Cross multiply
    639,287.20x = 957,663.60 × 560,490.40
  4. Step 4: Simplify right side
    639,287.20x = 536,761,254,229.44
  5. Step 5: Solve for x
    x = 536,761,254,229.44/639,287.20
  6. Step 6: Final answer
    x = 839,624.59

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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.