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Finding the Fourth Proportional to 740.88, 1,110.96 and 355.68

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Solution

The fourth proportional to 740.88, 1,110.96 and 355.68 is: 533.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    740.88 : 1,110.96 = 355.68 : x
  2. Step 2: Convert to fraction form
    740.88/1,110.96 = 355.68/x
  3. Step 3: Cross multiply
    740.88x = 1,110.96 × 355.68
  4. Step 4: Simplify right side
    740.88x = 395,146.25
  5. Step 5: Solve for x
    x = 395,146.25/740.88
  6. Step 6: Final answer
    x = 533.35

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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.