Home / 1,556.85-2,147.61-926.76

Finding the Fourth Proportional to 1,556.85, 2,147.61 and 926.76

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Solution

The fourth proportional to 1,556.85, 2,147.61 and 926.76 is: 1,278.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,556.85 : 2,147.61 = 926.76 : x
  2. Step 2: Convert to fraction form
    1,556.85/2,147.61 = 926.76/x
  3. Step 3: Cross multiply
    1,556.85x = 2,147.61 × 926.76
  4. Step 4: Simplify right side
    1,556.85x = 1,990,319.04
  5. Step 5: Solve for x
    x = 1,990,319.04/1,556.85
  6. Step 6: Final answer
    x = 1,278.43

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Find fourth proportional to 778.43, 1,073.81 and 463.38
Half scale
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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.