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Finding the Fourth Proportional to 547,780.90, 821,671.35 and 397,315.30

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Solution

The fourth proportional to 547,780.90, 821,671.35 and 397,315.30 is: 595,972.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,780.90 : 821,671.35 = 397,315.30 : x
  2. Step 2: Convert to fraction form
    547,780.90/821,671.35 = 397,315.30/x
  3. Step 3: Cross multiply
    547,780.90x = 821,671.35 × 397,315.30
  4. Step 4: Simplify right side
    547,780.90x = 326,462,598,926.66
  5. Step 5: Solve for x
    x = 326,462,598,926.66/547,780.90
  6. Step 6: Final answer
    x = 595,972.95

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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.