Home / 1,197.20-1,654.34-1,140.30

Finding the Fourth Proportional to 1,197.20, 1,654.34 and 1,140.30

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Solution

The fourth proportional to 1,197.20, 1,654.34 and 1,140.30 is: 1,575.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,197.20 : 1,654.34 = 1,140.30 : x
  2. Step 2: Convert to fraction form
    1,197.20/1,654.34 = 1,140.30/x
  3. Step 3: Cross multiply
    1,197.20x = 1,654.34 × 1,140.30
  4. Step 4: Simplify right side
    1,197.20x = 1,886,438.20
  5. Step 5: Solve for x
    x = 1,886,438.20/1,197.20
  6. Step 6: Final answer
    x = 1,575.72

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Double scale
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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.