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Finding the Fourth Proportional to 705.10, 972.55 and 442.94

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Solution

The fourth proportional to 705.10, 972.55 and 442.94 is: 610.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    705.10 : 972.55 = 442.94 : x
  2. Step 2: Convert to fraction form
    705.10/972.55 = 442.94/x
  3. Step 3: Cross multiply
    705.10x = 972.55 × 442.94
  4. Step 4: Simplify right side
    705.10x = 430,781.30
  5. Step 5: Solve for x
    x = 430,781.30/705.10
  6. Step 6: Final answer
    x = 610.95

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.