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Finding the Fourth Proportional to 522,078.20, 783,117.30 and 515,079.80

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Solution

The fourth proportional to 522,078.20, 783,117.30 and 515,079.80 is: 772,619.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    522,078.20 : 783,117.30 = 515,079.80 : x
  2. Step 2: Convert to fraction form
    522,078.20/783,117.30 = 515,079.80/x
  3. Step 3: Cross multiply
    522,078.20x = 783,117.30 × 515,079.80
  4. Step 4: Simplify right side
    522,078.20x = 403,367,902,260.54
  5. Step 5: Solve for x
    x = 403,367,902,260.54/522,078.20
  6. Step 6: Final answer
    x = 772,619.70

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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.