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Finding the Fourth Proportional to 1,344.13, 1,854.94 and 784.51

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Solution

The fourth proportional to 1,344.13, 1,854.94 and 784.51 is: 1,082.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,344.13 : 1,854.94 = 784.51 : x
  2. Step 2: Convert to fraction form
    1,344.13/1,854.94 = 784.51/x
  3. Step 3: Cross multiply
    1,344.13x = 1,854.94 × 784.51
  4. Step 4: Simplify right side
    1,344.13x = 1,455,218.98
  5. Step 5: Solve for x
    x = 1,455,218.98/1,344.13
  6. Step 6: Final answer
    x = 1,082.65

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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.