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Finding the Fourth Proportional to 585.48, 807.12 and 515.88

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Solution

The fourth proportional to 585.48, 807.12 and 515.88 is: 711.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    585.48 : 807.12 = 515.88 : x
  2. Step 2: Convert to fraction form
    585.48/807.12 = 515.88/x
  3. Step 3: Cross multiply
    585.48x = 807.12 × 515.88
  4. Step 4: Simplify right side
    585.48x = 416,377.07
  5. Step 5: Solve for x
    x = 416,377.07/585.48
  6. Step 6: Final answer
    x = 711.17

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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.