Home / 1,611.15-2,417.15-686.76

Finding the Fourth Proportional to 1,611.15, 2,417.15 and 686.76

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Solution

The fourth proportional to 1,611.15, 2,417.15 and 686.76 is: 1,030.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,611.15 : 2,417.15 = 686.76 : x
  2. Step 2: Convert to fraction form
    1,611.15/2,417.15 = 686.76/x
  3. Step 3: Cross multiply
    1,611.15x = 2,417.15 × 686.76
  4. Step 4: Simplify right side
    1,611.15x = 1,660,001.93
  5. Step 5: Solve for x
    x = 1,660,001.93/1,611.15
  6. Step 6: Final answer
    x = 1,030.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.