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Finding the Fourth Proportional to 667.30, 918.75 and 588.55

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Solution

The fourth proportional to 667.30, 918.75 and 588.55 is: 810.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    667.30 : 918.75 = 588.55 : x
  2. Step 2: Convert to fraction form
    667.30/918.75 = 588.55/x
  3. Step 3: Cross multiply
    667.30x = 918.75 × 588.55
  4. Step 4: Simplify right side
    667.30x = 540,730.31
  5. Step 5: Solve for x
    x = 540,730.31/667.30
  6. Step 6: Final answer
    x = 810.33

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1.5x scale

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.