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Finding the Fourth Proportional to 740.72, 1,110.12 and 556.68

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Solution

The fourth proportional to 740.72, 1,110.12 and 556.68 is: 834.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    740.72 : 1,110.12 = 556.68 : x
  2. Step 2: Convert to fraction form
    740.72/1,110.12 = 556.68/x
  3. Step 3: Cross multiply
    740.72x = 1,110.12 × 556.68
  4. Step 4: Simplify right side
    740.72x = 617,981.60
  5. Step 5: Solve for x
    x = 617,981.60/740.72
  6. Step 6: Final answer
    x = 834.30

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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.