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Finding the Fourth Proportional to 876,640.30, 1,314,960.45 and 699,493.30

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Solution

The fourth proportional to 876,640.30, 1,314,960.45 and 699,493.30 is: 1,049,239.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    876,640.30 : 1,314,960.45 = 699,493.30 : x
  2. Step 2: Convert to fraction form
    876,640.30/1,314,960.45 = 699,493.30/x
  3. Step 3: Cross multiply
    876,640.30x = 1,314,960.45 × 699,493.30
  4. Step 4: Simplify right side
    876,640.30x = 919,806,024,539.99
  5. Step 5: Solve for x
    x = 919,806,024,539.99/876,640.30
  6. Step 6: Final answer
    x = 1,049,239.95

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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.