Home / 3,139.68-4,331.60-1,880.76

Finding the Fourth Proportional to 3,139.68, 4,331.60 and 1,880.76

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Solution

The fourth proportional to 3,139.68, 4,331.60 and 1,880.76 is: 2,594.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,139.68 : 4,331.60 = 1,880.76 : x
  2. Step 2: Convert to fraction form
    3,139.68/4,331.60 = 1,880.76/x
  3. Step 3: Cross multiply
    3,139.68x = 4,331.60 × 1,880.76
  4. Step 4: Simplify right side
    3,139.68x = 8,146,700.02
  5. Step 5: Solve for x
    x = 8,146,700.02/3,139.68
  6. Step 6: Final answer
    x = 2,594.75

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Find fourth proportional to 1,569.84, 2,165.80 and 940.38
Half scale
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Double scale
Find fourth proportional to 3,140.68, 4,332.98 and 1,881.76
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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.