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Finding the Fourth Proportional to 3,242,643.20, 4,863,964.80 and 878,739.20

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Solution

The fourth proportional to 3,242,643.20, 4,863,964.80 and 878,739.20 is: 1,318,108.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,242,643.20 : 4,863,964.80 = 878,739.20 : x
  2. Step 2: Convert to fraction form
    3,242,643.20/4,863,964.80 = 878,739.20/x
  3. Step 3: Cross multiply
    3,242,643.20x = 4,863,964.80 × 878,739.20
  4. Step 4: Simplify right side
    3,242,643.20x = 4,274,156,537,180.16
  5. Step 5: Solve for x
    x = 4,274,156,537,180.16/3,242,643.20
  6. Step 6: Final answer
    x = 1,318,108.80

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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.