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Finding the Fourth Proportional to 295,438.40, 442,639.20 and 242,561.60

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Solution

The fourth proportional to 295,438.40, 442,639.20 and 242,561.60 is: 363,416.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    295,438.40 : 442,639.20 = 242,561.60 : x
  2. Step 2: Convert to fraction form
    295,438.40/442,639.20 = 242,561.60/x
  3. Step 3: Cross multiply
    295,438.40x = 442,639.20 × 242,561.60
  4. Step 4: Simplify right side
    295,438.40x = 107,367,272,574.72
  5. Step 5: Solve for x
    x = 107,367,272,574.72/295,438.40
  6. Step 6: Final answer
    x = 363,416.78

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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.