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Finding the Fourth Proportional to 646,785.80, 970,178.70 and 636,288.20

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Solution

The fourth proportional to 646,785.80, 970,178.70 and 636,288.20 is: 954,432.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,785.80 : 970,178.70 = 636,288.20 : x
  2. Step 2: Convert to fraction form
    646,785.80/970,178.70 = 636,288.20/x
  3. Step 3: Cross multiply
    646,785.80x = 970,178.70 × 636,288.20
  4. Step 4: Simplify right side
    646,785.80x = 617,313,258,701.34
  5. Step 5: Solve for x
    x = 617,313,258,701.34/646,785.80
  6. Step 6: Final answer
    x = 954,432.30

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Double scale
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Similar ratio
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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.