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Finding the Fourth Proportional to 1,332.05, 1,837.17 and 977.81

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Solution

The fourth proportional to 1,332.05, 1,837.17 and 977.81 is: 1,348.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,332.05 : 1,837.17 = 977.81 : x
  2. Step 2: Convert to fraction form
    1,332.05/1,837.17 = 977.81/x
  3. Step 3: Cross multiply
    1,332.05x = 1,837.17 × 977.81
  4. Step 4: Simplify right side
    1,332.05x = 1,796,394.01
  5. Step 5: Solve for x
    x = 1,796,394.01/1,332.05
  6. Step 6: Final answer
    x = 1,348.60

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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.