Home / 1,403.39-1,937.51-1,247.71

Finding the Fourth Proportional to 1,403.39, 1,937.51 and 1,247.71

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Solution

The fourth proportional to 1,403.39, 1,937.51 and 1,247.71 is: 1,722.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,403.39 : 1,937.51 = 1,247.71 : x
  2. Step 2: Convert to fraction form
    1,403.39/1,937.51 = 1,247.71/x
  3. Step 3: Cross multiply
    1,403.39x = 1,937.51 × 1,247.71
  4. Step 4: Simplify right side
    1,403.39x = 2,417,454.85
  5. Step 5: Solve for x
    x = 2,417,454.85/1,403.39
  6. Step 6: Final answer
    x = 1,722.58

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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.