Home / 547,787.40-821,681.10-397,321.80

Finding the Fourth Proportional to 547,787.40, 821,681.10 and 397,321.80

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Solution

The fourth proportional to 547,787.40, 821,681.10 and 397,321.80 is: 595,982.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,787.40 : 821,681.10 = 397,321.80 : x
  2. Step 2: Convert to fraction form
    547,787.40/821,681.10 = 397,321.80/x
  3. Step 3: Cross multiply
    547,787.40x = 821,681.10 × 397,321.80
  4. Step 4: Simplify right side
    547,787.40x = 326,471,813,677.98
  5. Step 5: Solve for x
    x = 326,471,813,677.98/547,787.40
  6. Step 6: Final answer
    x = 595,982.70

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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.