Home / 1,040.60-1,436.27-686.58

Finding the Fourth Proportional to 1,040.60, 1,436.27 and 686.58

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Solution

The fourth proportional to 1,040.60, 1,436.27 and 686.58 is: 947.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,040.60 : 1,436.27 = 686.58 : x
  2. Step 2: Convert to fraction form
    1,040.60/1,436.27 = 686.58/x
  3. Step 3: Cross multiply
    1,040.60x = 1,436.27 × 686.58
  4. Step 4: Simplify right side
    1,040.60x = 986,113.52
  5. Step 5: Solve for x
    x = 986,113.52/1,040.60
  6. Step 6: Final answer
    x = 947.64

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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.