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Finding the Fourth Proportional to 1,298.40, 1,947.71 and 374.05

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Solution

The fourth proportional to 1,298.40, 1,947.71 and 374.05 is: 561.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,298.40 : 1,947.71 = 374.05 : x
  2. Step 2: Convert to fraction form
    1,298.40/1,947.71 = 374.05/x
  3. Step 3: Cross multiply
    1,298.40x = 1,947.71 × 374.05
  4. Step 4: Simplify right side
    1,298.40x = 728,540.93
  5. Step 5: Solve for x
    x = 728,540.93/1,298.40
  6. Step 6: Final answer
    x = 561.11

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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.