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Finding the Fourth Proportional to 872,492.14, 1,203,891.73 and 485,256.66

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Solution

The fourth proportional to 872,492.14, 1,203,891.73 and 485,256.66 is: 669,572.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    872,492.14 : 1,203,891.73 = 485,256.66 : x
  2. Step 2: Convert to fraction form
    872,492.14/1,203,891.73 = 485,256.66/x
  3. Step 3: Cross multiply
    872,492.14x = 1,203,891.73 × 485,256.66
  4. Step 4: Simplify right side
    872,492.14x = 584,196,479,901.42
  5. Step 5: Solve for x
    x = 584,196,479,901.42/872,492.14
  6. Step 6: Final answer
    x = 669,572.20

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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.