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Finding the Fourth Proportional to 876,695.70, 1,315,043.55 and 315,657.30

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Solution

The fourth proportional to 876,695.70, 1,315,043.55 and 315,657.30 is: 473,485.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    876,695.70 : 1,315,043.55 = 315,657.30 : x
  2. Step 2: Convert to fraction form
    876,695.70/1,315,043.55 = 315,657.30/x
  3. Step 3: Cross multiply
    876,695.70x = 1,315,043.55 × 315,657.30
  4. Step 4: Simplify right side
    876,695.70x = 415,103,096,375.42
  5. Step 5: Solve for x
    x = 415,103,096,375.42/876,695.70
  6. Step 6: Final answer
    x = 473,485.95

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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.