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Finding the Fourth Proportional to 438,863.28, 605,459.82 and 255,071.28

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Solution

The fourth proportional to 438,863.28, 605,459.82 and 255,071.28 is: 351,898.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,863.28 : 605,459.82 = 255,071.28 : x
  2. Step 2: Convert to fraction form
    438,863.28/605,459.82 = 255,071.28/x
  3. Step 3: Cross multiply
    438,863.28x = 605,459.82 × 255,071.28
  4. Step 4: Simplify right side
    438,863.28x = 154,435,411,275.97
  5. Step 5: Solve for x
    x = 154,435,411,275.97/438,863.28
  6. Step 6: Final answer
    x = 351,898.69

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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.