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Finding the Fourth Proportional to 295,418.80, 442,825.80 and 145,428.40

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Solution

The fourth proportional to 295,418.80, 442,825.80 and 145,428.40 is: 217,993.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    295,418.80 : 442,825.80 = 145,428.40 : x
  2. Step 2: Convert to fraction form
    295,418.80/442,825.80 = 145,428.40/x
  3. Step 3: Cross multiply
    295,418.80x = 442,825.80 × 145,428.40
  4. Step 4: Simplify right side
    295,418.80x = 64,399,447,572.72
  5. Step 5: Solve for x
    x = 64,399,447,572.72/295,418.80
  6. Step 6: Final answer
    x = 217,993.73

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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.