Home / 1,472.19-2,031.61-809.08

Finding the Fourth Proportional to 1,472.19, 2,031.61 and 809.08

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Solution

The fourth proportional to 1,472.19, 2,031.61 and 809.08 is: 1,116.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,472.19 : 2,031.61 = 809.08 : x
  2. Step 2: Convert to fraction form
    1,472.19/2,031.61 = 809.08/x
  3. Step 3: Cross multiply
    1,472.19x = 2,031.61 × 809.08
  4. Step 4: Simplify right side
    1,472.19x = 1,643,736.28
  5. Step 5: Solve for x
    x = 1,643,736.28/1,472.19
  6. Step 6: Final answer
    x = 1,116.53

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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.