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Finding the Fourth Proportional to 716,611.80, 988,931.30 and 394,328.83

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Solution

The fourth proportional to 716,611.80, 988,931.30 and 394,328.83 is: 544,177.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,611.80 : 988,931.30 = 394,328.83 : x
  2. Step 2: Convert to fraction form
    716,611.80/988,931.30 = 394,328.83/x
  3. Step 3: Cross multiply
    716,611.80x = 988,931.30 × 394,328.83
  4. Step 4: Simplify right side
    716,611.80x = 389,964,122,479.38
  5. Step 5: Solve for x
    x = 389,964,122,479.38/716,611.80
  6. Step 6: Final answer
    x = 544,177.65

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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.