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Finding the Fourth Proportional to 1,049.70, 1,448.78 and 607.85

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Solution

The fourth proportional to 1,049.70, 1,448.78 and 607.85 is: 838.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,049.70 : 1,448.78 = 607.85 : x
  2. Step 2: Convert to fraction form
    1,049.70/1,448.78 = 607.85/x
  3. Step 3: Cross multiply
    1,049.70x = 1,448.78 × 607.85
  4. Step 4: Simplify right side
    1,049.70x = 880,630.64
  5. Step 5: Solve for x
    x = 880,630.64/1,049.70
  6. Step 6: Final answer
    x = 838.94

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1.5x scale

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.