Home / 1,885.20-2,601.36-1,139.28

Finding the Fourth Proportional to 1,885.20, 2,601.36 and 1,139.28

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Solution

The fourth proportional to 1,885.20, 2,601.36 and 1,139.28 is: 1,572.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,885.20 : 2,601.36 = 1,139.28 : x
  2. Step 2: Convert to fraction form
    1,885.20/2,601.36 = 1,139.28/x
  3. Step 3: Cross multiply
    1,885.20x = 2,601.36 × 1,139.28
  4. Step 4: Simplify right side
    1,885.20x = 2,963,677.42
  5. Step 5: Solve for x
    x = 2,963,677.42/1,885.20
  6. Step 6: Final answer
    x = 1,572.08

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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.