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Finding the Fourth Proportional to 647,079.70, 970,619.55 and 618,049.30

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Solution

The fourth proportional to 647,079.70, 970,619.55 and 618,049.30 is: 927,073.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,079.70 : 970,619.55 = 618,049.30 : x
  2. Step 2: Convert to fraction form
    647,079.70/970,619.55 = 618,049.30/x
  3. Step 3: Cross multiply
    647,079.70x = 970,619.55 × 618,049.30
  4. Step 4: Simplify right side
    647,079.70x = 599,890,733,443.82
  5. Step 5: Solve for x
    x = 599,890,733,443.82/647,079.70
  6. Step 6: Final answer
    x = 927,073.95

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Double scale
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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.