Home / 781,780.80-1,172,145.60-308,222.40

Finding the Fourth Proportional to 781,780.80, 1,172,145.60 and 308,222.40

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Solution

The fourth proportional to 781,780.80, 1,172,145.60 and 308,222.40 is: 462,126.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    781,780.80 : 1,172,145.60 = 308,222.40 : x
  2. Step 2: Convert to fraction form
    781,780.80/1,172,145.60 = 308,222.40/x
  3. Step 3: Cross multiply
    781,780.80x = 1,172,145.60 × 308,222.40
  4. Step 4: Simplify right side
    781,780.80x = 361,281,529,981.44
  5. Step 5: Solve for x
    x = 361,281,529,981.44/781,780.80
  6. Step 6: Final answer
    x = 462,126.38

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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.