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Finding the Fourth Proportional to 411,315.12, 615,859.56 and 268,805.28

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Solution

The fourth proportional to 411,315.12, 615,859.56 and 268,805.28 is: 402,480.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    411,315.12 : 615,859.56 = 268,805.28 : x
  2. Step 2: Convert to fraction form
    411,315.12/615,859.56 = 268,805.28/x
  3. Step 3: Cross multiply
    411,315.12x = 615,859.56 × 268,805.28
  4. Step 4: Simplify right side
    411,315.12x = 165,546,301,466.48
  5. Step 5: Solve for x
    x = 165,546,301,466.48/411,315.12
  6. Step 6: Final answer
    x = 402,480.47

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.