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Finding the Fourth Proportional to 1,230.70, 1,841.55 and 906.70

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Solution

The fourth proportional to 1,230.70, 1,841.55 and 906.70 is: 1,356.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,230.70 : 1,841.55 = 906.70 : x
  2. Step 2: Convert to fraction form
    1,230.70/1,841.55 = 906.70/x
  3. Step 3: Cross multiply
    1,230.70x = 1,841.55 × 906.70
  4. Step 4: Simplify right side
    1,230.70x = 1,669,733.39
  5. Step 5: Solve for x
    x = 1,669,733.39/1,230.70
  6. Step 6: Final answer
    x = 1,356.73

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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.