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Finding the Fourth Proportional to 935.10, 1,289.91 and 585.18

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Solution

The fourth proportional to 935.10, 1,289.91 and 585.18 is: 807.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    935.10 : 1,289.91 = 585.18 : x
  2. Step 2: Convert to fraction form
    935.10/1,289.91 = 585.18/x
  3. Step 3: Cross multiply
    935.10x = 1,289.91 × 585.18
  4. Step 4: Simplify right side
    935.10x = 754,829.53
  5. Step 5: Solve for x
    x = 754,829.53/935.10
  6. Step 6: Final answer
    x = 807.22

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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.