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Finding the Fourth Proportional to 578,803.60, 867,913.80 and 342,218.80

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Solution

The fourth proportional to 578,803.60, 867,913.80 and 342,218.80 is: 513,155.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,803.60 : 867,913.80 = 342,218.80 : x
  2. Step 2: Convert to fraction form
    578,803.60/867,913.80 = 342,218.80/x
  3. Step 3: Cross multiply
    578,803.60x = 867,913.80 × 342,218.80
  4. Step 4: Simplify right side
    578,803.60x = 297,016,419,139.44
  5. Step 5: Solve for x
    x = 297,016,419,139.44/578,803.60
  6. Step 6: Final answer
    x = 513,155.79

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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.