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Finding the Fourth Proportional to 817,882.12, 1,128,687.78 and 450,402.44

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Solution

The fourth proportional to 817,882.12, 1,128,687.78 and 450,402.44 is: 621,561.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    817,882.12 : 1,128,687.78 = 450,402.44 : x
  2. Step 2: Convert to fraction form
    817,882.12/1,128,687.78 = 450,402.44/x
  3. Step 3: Cross multiply
    817,882.12x = 1,128,687.78 × 450,402.44
  4. Step 4: Simplify right side
    817,882.12x = 508,363,730,110.18
  5. Step 5: Solve for x
    x = 508,363,730,110.18/817,882.12
  6. Step 6: Final answer
    x = 621,561.12

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1.5x scale

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.