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Finding the Fourth Proportional to 534,678.80, 802,018.20 and 499,249.40

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Solution

The fourth proportional to 534,678.80, 802,018.20 and 499,249.40 is: 748,874.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    534,678.80 : 802,018.20 = 499,249.40 : x
  2. Step 2: Convert to fraction form
    534,678.80/802,018.20 = 499,249.40/x
  3. Step 3: Cross multiply
    534,678.80x = 802,018.20 × 499,249.40
  4. Step 4: Simplify right side
    534,678.80x = 400,407,105,139.08
  5. Step 5: Solve for x
    x = 400,407,105,139.08/534,678.80
  6. Step 6: Final answer
    x = 748,874.10

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Half scale
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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.