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Finding the Fourth Proportional to 522,070.20, 783,105.30 and 515,071.80

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Solution

The fourth proportional to 522,070.20, 783,105.30 and 515,071.80 is: 772,607.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    522,070.20 : 783,105.30 = 515,071.80 : x
  2. Step 2: Convert to fraction form
    522,070.20/783,105.30 = 515,071.80/x
  3. Step 3: Cross multiply
    522,070.20x = 783,105.30 × 515,071.80
  4. Step 4: Simplify right side
    522,070.20x = 403,355,456,460.54
  5. Step 5: Solve for x
    x = 403,355,456,460.54/522,070.20
  6. Step 6: Final answer
    x = 772,607.70

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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.