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Finding the Fourth Proportional to 750.76, 1,036.22 and 488.32

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Solution

The fourth proportional to 750.76, 1,036.22 and 488.32 is: 673.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    750.76 : 1,036.22 = 488.32 : x
  2. Step 2: Convert to fraction form
    750.76/1,036.22 = 488.32/x
  3. Step 3: Cross multiply
    750.76x = 1,036.22 × 488.32
  4. Step 4: Simplify right side
    750.76x = 506,006.95
  5. Step 5: Solve for x
    x = 506,006.95/750.76
  6. Step 6: Final answer
    x = 673.99

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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.