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Finding the Fourth Proportional to 1,332.15, 1,838.23 and 772.62

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Solution

The fourth proportional to 1,332.15, 1,838.23 and 772.62 is: 1,066.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,332.15 : 1,838.23 = 772.62 : x
  2. Step 2: Convert to fraction form
    1,332.15/1,838.23 = 772.62/x
  3. Step 3: Cross multiply
    1,332.15x = 1,838.23 × 772.62
  4. Step 4: Simplify right side
    1,332.15x = 1,420,253.26
  5. Step 5: Solve for x
    x = 1,420,253.26/1,332.15
  6. Step 6: Final answer
    x = 1,066.14

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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.