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Finding the Fourth Proportional to 498,408.63, 687,803.73 and 272,054.13

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Solution

The fourth proportional to 498,408.63, 687,803.73 and 272,054.13 is: 375,434.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    498,408.63 : 687,803.73 = 272,054.13 : x
  2. Step 2: Convert to fraction form
    498,408.63/687,803.73 = 272,054.13/x
  3. Step 3: Cross multiply
    498,408.63x = 687,803.73 × 272,054.13
  4. Step 4: Simplify right side
    498,408.63x = 187,119,845,375.91
  5. Step 5: Solve for x
    x = 187,119,845,375.91/498,408.63
  6. Step 6: Final answer
    x = 375,434.60

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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.