Home / 1,397.28-1,931.80-1,336.08

Finding the Fourth Proportional to 1,397.28, 1,931.80 and 1,336.08

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Solution

The fourth proportional to 1,397.28, 1,931.80 and 1,336.08 is: 1,847.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,397.28 : 1,931.80 = 1,336.08 : x
  2. Step 2: Convert to fraction form
    1,397.28/1,931.80 = 1,336.08/x
  3. Step 3: Cross multiply
    1,397.28x = 1,931.80 × 1,336.08
  4. Step 4: Simplify right side
    1,397.28x = 2,581,039.34
  5. Step 5: Solve for x
    x = 2,581,039.34/1,397.28
  6. Step 6: Final answer
    x = 1,847.19

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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.