Home / 1,686.15-2,326.84-977.55

Finding the Fourth Proportional to 1,686.15, 2,326.84 and 977.55

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Solution

The fourth proportional to 1,686.15, 2,326.84 and 977.55 is: 1,348.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,686.15 : 2,326.84 = 977.55 : x
  2. Step 2: Convert to fraction form
    1,686.15/2,326.84 = 977.55/x
  3. Step 3: Cross multiply
    1,686.15x = 2,326.84 × 977.55
  4. Step 4: Simplify right side
    1,686.15x = 2,274,602.44
  5. Step 5: Solve for x
    x = 2,274,602.44/1,686.15
  6. Step 6: Final answer
    x = 1,348.99

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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.