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Finding the Fourth Proportional to 740.49, 1,111.19 and 415.95

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Solution

The fourth proportional to 740.49, 1,111.19 and 415.95 is: 624.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    740.49 : 1,111.19 = 415.95 : x
  2. Step 2: Convert to fraction form
    740.49/1,111.19 = 415.95/x
  3. Step 3: Cross multiply
    740.49x = 1,111.19 × 415.95
  4. Step 4: Simplify right side
    740.49x = 462,197.40
  5. Step 5: Solve for x
    x = 462,197.40/740.49
  6. Step 6: Final answer
    x = 624.18

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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.