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Finding the Fourth Proportional to 935.62, 1,290.62 and 585.70

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Solution

The fourth proportional to 935.62, 1,290.62 and 585.70 is: 807.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    935.62 : 1,290.62 = 585.70 : x
  2. Step 2: Convert to fraction form
    935.62/1,290.62 = 585.70/x
  3. Step 3: Cross multiply
    935.62x = 1,290.62 × 585.70
  4. Step 4: Simplify right side
    935.62x = 755,921.63
  5. Step 5: Solve for x
    x = 755,921.63/935.62
  6. Step 6: Final answer
    x = 807.93

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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.