Home / 3,390.71-5,082.95-1,312.10

Finding the Fourth Proportional to 3,390.71, 5,082.95 and 1,312.10

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Solution

The fourth proportional to 3,390.71, 5,082.95 and 1,312.10 is: 1,966.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,390.71 : 5,082.95 = 1,312.10 : x
  2. Step 2: Convert to fraction form
    3,390.71/5,082.95 = 1,312.10/x
  3. Step 3: Cross multiply
    3,390.71x = 5,082.95 × 1,312.10
  4. Step 4: Simplify right side
    3,390.71x = 6,669,335.62
  5. Step 5: Solve for x
    x = 6,669,335.62/3,390.71
  6. Step 6: Final answer
    x = 1,966.94

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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.