Home / 687,611.28-1,031,628.08-328,240.71

Finding the Fourth Proportional to 687,611.28, 1,031,628.08 and 328,240.71

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Solution

The fourth proportional to 687,611.28, 1,031,628.08 and 328,240.71 is: 492,461.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,611.28 : 1,031,628.08 = 328,240.71 : x
  2. Step 2: Convert to fraction form
    687,611.28/1,031,628.08 = 328,240.71/x
  3. Step 3: Cross multiply
    687,611.28x = 1,031,628.08 × 328,240.71
  4. Step 4: Simplify right side
    687,611.28x = 338,622,331,793.93
  5. Step 5: Solve for x
    x = 338,622,331,793.93/687,611.28
  6. Step 6: Final answer
    x = 492,461.86

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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.