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Finding the Fourth Proportional to 748.62, 1,118.43 and 472.50

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Solution

The fourth proportional to 748.62, 1,118.43 and 472.50 is: 705.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    748.62 : 1,118.43 = 472.50 : x
  2. Step 2: Convert to fraction form
    748.62/1,118.43 = 472.50/x
  3. Step 3: Cross multiply
    748.62x = 1,118.43 × 472.50
  4. Step 4: Simplify right side
    748.62x = 528,458.18
  5. Step 5: Solve for x
    x = 528,458.18/748.62
  6. Step 6: Final answer
    x = 705.91

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.