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Finding the Fourth Proportional to 547,488.10, 821,232.15 and 485,280.10

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Solution

The fourth proportional to 547,488.10, 821,232.15 and 485,280.10 is: 727,920.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,488.10 : 821,232.15 = 485,280.10 : x
  2. Step 2: Convert to fraction form
    547,488.10/821,232.15 = 485,280.10/x
  3. Step 3: Cross multiply
    547,488.10x = 821,232.15 × 485,280.10
  4. Step 4: Simplify right side
    547,488.10x = 398,527,619,875.22
  5. Step 5: Solve for x
    x = 398,527,619,875.22/547,488.10
  6. Step 6: Final answer
    x = 727,920.15

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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.