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Finding the Fourth Proportional to 739.15, 1,108.85 and 245.58

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Solution

The fourth proportional to 739.15, 1,108.85 and 245.58 is: 368.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    739.15 : 1,108.85 = 245.58 : x
  2. Step 2: Convert to fraction form
    739.15/1,108.85 = 245.58/x
  3. Step 3: Cross multiply
    739.15x = 1,108.85 × 245.58
  4. Step 4: Simplify right side
    739.15x = 272,314.16
  5. Step 5: Solve for x
    x = 272,314.16/739.15
  6. Step 6: Final answer
    x = 368.42

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1.5x scale

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.