Home / 1,332.19-1,838.40-742.71

Finding the Fourth Proportional to 1,332.19, 1,838.40 and 742.71

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Solution

The fourth proportional to 1,332.19, 1,838.40 and 742.71 is: 1,024.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,332.19 : 1,838.40 = 742.71 : x
  2. Step 2: Convert to fraction form
    1,332.19/1,838.40 = 742.71/x
  3. Step 3: Cross multiply
    1,332.19x = 1,838.40 × 742.71
  4. Step 4: Simplify right side
    1,332.19x = 1,365,402.17
  5. Step 5: Solve for x
    x = 1,365,402.17/1,332.19
  6. Step 6: Final answer
    x = 1,024.93

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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.