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Finding the Fourth Proportional to 498,409.63, 687,805.11 and 272,055.13

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Solution

The fourth proportional to 498,409.63, 687,805.11 and 272,055.13 is: 375,435.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    498,409.63 : 687,805.11 = 272,055.13 : x
  2. Step 2: Convert to fraction form
    498,409.63/687,805.11 = 272,055.13/x
  3. Step 3: Cross multiply
    498,409.63x = 687,805.11 × 272,055.13
  4. Step 4: Simplify right side
    498,409.63x = 187,120,908,615.71
  5. Step 5: Solve for x
    x = 187,120,908,615.71/498,409.63
  6. Step 6: Final answer
    x = 375,435.98

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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.