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Finding the Fourth Proportional to 876,097.28, 1,209,070.68 and 513,389

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Solution

The fourth proportional to 876,097.28, 1,209,070.68 and 513,389 is: 708,509.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    876,097.28 : 1,209,070.68 = 513,389 : x
  2. Step 2: Convert to fraction form
    876,097.28/1,209,070.68 = 513,389/x
  3. Step 3: Cross multiply
    876,097.28x = 1,209,070.68 × 513,389
  4. Step 4: Simplify right side
    876,097.28x = 620,723,587,334.52
  5. Step 5: Solve for x
    x = 620,723,587,334.52/876,097.28
  6. Step 6: Final answer
    x = 708,509.89

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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.