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Finding the Fourth Proportional to 664.29, 915.75 and 585.95

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Solution

The fourth proportional to 664.29, 915.75 and 585.95 is: 807.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    664.29 : 915.75 = 585.95 : x
  2. Step 2: Convert to fraction form
    664.29/915.75 = 585.95/x
  3. Step 3: Cross multiply
    664.29x = 915.75 × 585.95
  4. Step 4: Simplify right side
    664.29x = 536,579.13
  5. Step 5: Solve for x
    x = 536,579.13/664.29
  6. Step 6: Final answer
    x = 807.75

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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.