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Finding the Fourth Proportional to 740.59, 1,111.32 and 394.18

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Solution

The fourth proportional to 740.59, 1,111.32 and 394.18 is: 591.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    740.59 : 1,111.32 = 394.18 : x
  2. Step 2: Convert to fraction form
    740.59/1,111.32 = 394.18/x
  3. Step 3: Cross multiply
    740.59x = 1,111.32 × 394.18
  4. Step 4: Simplify right side
    740.59x = 438,052.59
  5. Step 5: Solve for x
    x = 438,052.59/740.59
  6. Step 6: Final answer
    x = 591.50

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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.