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Finding the Fourth Proportional to 1,332.46, 1,838.85 and 772.81

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Solution

The fourth proportional to 1,332.46, 1,838.85 and 772.81 is: 1,066.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,332.46 : 1,838.85 = 772.81 : x
  2. Step 2: Convert to fraction form
    1,332.46/1,838.85 = 772.81/x
  3. Step 3: Cross multiply
    1,332.46x = 1,838.85 × 772.81
  4. Step 4: Simplify right side
    1,332.46x = 1,421,081.67
  5. Step 5: Solve for x
    x = 1,421,081.67/1,332.46
  6. Step 6: Final answer
    x = 1,066.51

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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.