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Finding the Fourth Proportional to 545,785.80, 818,678.70 and 171,808.80

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Solution

The fourth proportional to 545,785.80, 818,678.70 and 171,808.80 is: 257,713.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,785.80 : 818,678.70 = 171,808.80 : x
  2. Step 2: Convert to fraction form
    545,785.80/818,678.70 = 171,808.80/x
  3. Step 3: Cross multiply
    545,785.80x = 818,678.70 × 171,808.80
  4. Step 4: Simplify right side
    545,785.80x = 140,656,205,032.56
  5. Step 5: Solve for x
    x = 140,656,205,032.56/545,785.80
  6. Step 6: Final answer
    x = 257,713.20

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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.