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Finding the Fourth Proportional to 438,691.32, 605,444.76 and 266,618.16

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Solution

The fourth proportional to 438,691.32, 605,444.76 and 266,618.16 is: 367,963.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,691.32 : 605,444.76 = 266,618.16 : x
  2. Step 2: Convert to fraction form
    438,691.32/605,444.76 = 266,618.16/x
  3. Step 3: Cross multiply
    438,691.32x = 605,444.76 × 266,618.16
  4. Step 4: Simplify right side
    438,691.32x = 161,422,567,892.84
  5. Step 5: Solve for x
    x = 161,422,567,892.84/438,691.32
  6. Step 6: Final answer
    x = 367,963.90

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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.