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Finding the Fourth Proportional to 876,687.80, 1,314,059.70 and 344,031.80

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Solution

The fourth proportional to 876,687.80, 1,314,059.70 and 344,031.80 is: 515,666.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    876,687.80 : 1,314,059.70 = 344,031.80 : x
  2. Step 2: Convert to fraction form
    876,687.80/1,314,059.70 = 344,031.80/x
  3. Step 3: Cross multiply
    876,687.80x = 1,314,059.70 × 344,031.80
  4. Step 4: Simplify right side
    876,687.80x = 452,078,323,898.46
  5. Step 5: Solve for x
    x = 452,078,323,898.46/876,687.80
  6. Step 6: Final answer
    x = 515,666.27

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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.