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Finding the Fourth Proportional to 519,287.80, 778,874.10 and 425,630.20

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Solution

The fourth proportional to 519,287.80, 778,874.10 and 425,630.20 is: 638,398.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,287.80 : 778,874.10 = 425,630.20 : x
  2. Step 2: Convert to fraction form
    519,287.80/778,874.10 = 425,630.20/x
  3. Step 3: Cross multiply
    519,287.80x = 778,874.10 × 425,630.20
  4. Step 4: Simplify right side
    519,287.80x = 331,512,338,957.82
  5. Step 5: Solve for x
    x = 331,512,338,957.82/519,287.80
  6. Step 6: Final answer
    x = 638,398.09

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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.