Home / 847,612.40-1,271,278.85-279,000.90

Finding the Fourth Proportional to 847,612.40, 1,271,278.85 and 279,000.90

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Solution

The fourth proportional to 847,612.40, 1,271,278.85 and 279,000.90 is: 418,455.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    847,612.40 : 1,271,278.85 = 279,000.90 : x
  2. Step 2: Convert to fraction form
    847,612.40/1,271,278.85 = 279,000.90/x
  3. Step 3: Cross multiply
    847,612.40x = 1,271,278.85 × 279,000.90
  4. Step 4: Simplify right side
    847,612.40x = 354,687,941,905.96
  5. Step 5: Solve for x
    x = 354,687,941,905.96/847,612.40
  6. Step 6: Final answer
    x = 418,455.35

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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.