Home / 2,117.79-3,180.38-1,386.99

Finding the Fourth Proportional to 2,117.79, 3,180.38 and 1,386.99

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Solution

The fourth proportional to 2,117.79, 3,180.38 and 1,386.99 is: 2,082.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,117.79 : 3,180.38 = 1,386.99 : x
  2. Step 2: Convert to fraction form
    2,117.79/3,180.38 = 1,386.99/x
  3. Step 3: Cross multiply
    2,117.79x = 3,180.38 × 1,386.99
  4. Step 4: Simplify right side
    2,117.79x = 4,411,148.32
  5. Step 5: Solve for x
    x = 4,411,148.32/2,117.79
  6. Step 6: Final answer
    x = 2,082.90

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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.