Home / 1,016.14-1,402.80-686.30

Finding the Fourth Proportional to 1,016.14, 1,402.80 and 686.30

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Solution

The fourth proportional to 1,016.14, 1,402.80 and 686.30 is: 947.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,016.14 : 1,402.80 = 686.30 : x
  2. Step 2: Convert to fraction form
    1,016.14/1,402.80 = 686.30/x
  3. Step 3: Cross multiply
    1,016.14x = 1,402.80 × 686.30
  4. Step 4: Simplify right side
    1,016.14x = 962,741.64
  5. Step 5: Solve for x
    x = 962,741.64/1,016.14
  6. Step 6: Final answer
    x = 947.45

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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.