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Finding the Fourth Proportional to 642,125.17, 886,728.40 and 480,699.97

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Solution

The fourth proportional to 642,125.17, 886,728.40 and 480,699.97 is: 663,811.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,125.17 : 886,728.40 = 480,699.97 : x
  2. Step 2: Convert to fraction form
    642,125.17/886,728.40 = 480,699.97/x
  3. Step 3: Cross multiply
    642,125.17x = 886,728.40 × 480,699.97
  4. Step 4: Simplify right side
    642,125.17x = 426,250,311,859.58
  5. Step 5: Solve for x
    x = 426,250,311,859.58/642,125.17
  6. Step 6: Final answer
    x = 663,811.87

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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.