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Finding the Fourth Proportional to 750.34, 1,122.45 and 634.06

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Solution

The fourth proportional to 750.34, 1,122.45 and 634.06 is: 948.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    750.34 : 1,122.45 = 634.06 : x
  2. Step 2: Convert to fraction form
    750.34/1,122.45 = 634.06/x
  3. Step 3: Cross multiply
    750.34x = 1,122.45 × 634.06
  4. Step 4: Simplify right side
    750.34x = 711,700.65
  5. Step 5: Solve for x
    x = 711,700.65/750.34
  6. Step 6: Final answer
    x = 948.50

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.