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Finding the Fourth Proportional to 750.90, 1,036.20 and 471.18

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Solution

The fourth proportional to 750.90, 1,036.20 and 471.18 is: 650.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    750.90 : 1,036.20 = 471.18 : x
  2. Step 2: Convert to fraction form
    750.90/1,036.20 = 471.18/x
  3. Step 3: Cross multiply
    750.90x = 1,036.20 × 471.18
  4. Step 4: Simplify right side
    750.90x = 488,236.72
  5. Step 5: Solve for x
    x = 488,236.72/750.90
  6. Step 6: Final answer
    x = 650.20

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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.