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Finding the Fourth Proportional to 876,099.28, 1,209,073.44 and 513,391

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Solution

The fourth proportional to 876,099.28, 1,209,073.44 and 513,391 is: 708,512.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    876,099.28 : 1,209,073.44 = 513,391 : x
  2. Step 2: Convert to fraction form
    876,099.28/1,209,073.44 = 513,391/x
  3. Step 3: Cross multiply
    876,099.28x = 1,209,073.44 × 513,391
  4. Step 4: Simplify right side
    876,099.28x = 620,727,422,435.04
  5. Step 5: Solve for x
    x = 620,727,422,435.04/876,099.28
  6. Step 6: Final answer
    x = 708,512.65

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.