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Finding the Fourth Proportional to 456,061.20, 684,286.20 and 287,710.80

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Solution

The fourth proportional to 456,061.20, 684,286.20 and 287,710.80 is: 431,688.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    456,061.20 : 684,286.20 = 287,710.80 : x
  2. Step 2: Convert to fraction form
    456,061.20/684,286.20 = 287,710.80/x
  3. Step 3: Cross multiply
    456,061.20x = 684,286.20 × 287,710.80
  4. Step 4: Simplify right side
    456,061.20x = 196,876,530,030.96
  5. Step 5: Solve for x
    x = 196,876,530,030.96/456,061.20
  6. Step 6: Final answer
    x = 431,688.84

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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.