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Finding the Fourth Proportional to 744.95, 1,117.62 and 354.93

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Solution

The fourth proportional to 744.95, 1,117.62 and 354.93 is: 532.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    744.95 : 1,117.62 = 354.93 : x
  2. Step 2: Convert to fraction form
    744.95/1,117.62 = 354.93/x
  3. Step 3: Cross multiply
    744.95x = 1,117.62 × 354.93
  4. Step 4: Simplify right side
    744.95x = 396,676.87
  5. Step 5: Solve for x
    x = 396,676.87/744.95
  6. Step 6: Final answer
    x = 532.49

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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.