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Finding the Fourth Proportional to 876,687.80, 1,315,031.70 and 666,735.80

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Solution

The fourth proportional to 876,687.80, 1,315,031.70 and 666,735.80 is: 1,000,103.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    876,687.80 : 1,315,031.70 = 666,735.80 : x
  2. Step 2: Convert to fraction form
    876,687.80/1,315,031.70 = 666,735.80/x
  3. Step 3: Cross multiply
    876,687.80x = 1,315,031.70 × 666,735.80
  4. Step 4: Simplify right side
    876,687.80x = 876,778,712,524.86
  5. Step 5: Solve for x
    x = 876,778,712,524.86/876,687.80
  6. Step 6: Final answer
    x = 1,000,103.70

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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.