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Finding the Fourth Proportional to 547,812.80, 821,719.20 and 508,932.80

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Solution

The fourth proportional to 547,812.80, 821,719.20 and 508,932.80 is: 763,399.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,812.80 : 821,719.20 = 508,932.80 : x
  2. Step 2: Convert to fraction form
    547,812.80/821,719.20 = 508,932.80/x
  3. Step 3: Cross multiply
    547,812.80x = 821,719.20 × 508,932.80
  4. Step 4: Simplify right side
    547,812.80x = 418,199,853,269.76
  5. Step 5: Solve for x
    x = 418,199,853,269.76/547,812.80
  6. Step 6: Final answer
    x = 763,399.20

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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.