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Finding the Fourth Proportional to 879,534, 1,319,234.76 and 280,470.96

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Solution

The fourth proportional to 879,534, 1,319,234.76 and 280,470.96 is: 420,685.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    879,534 : 1,319,234.76 = 280,470.96 : x
  2. Step 2: Convert to fraction form
    879,534/1,319,234.76 = 280,470.96/x
  3. Step 3: Cross multiply
    879,534x = 1,319,234.76 × 280,470.96
  4. Step 4: Simplify right side
    879,534x = 370,007,039,602.57
  5. Step 5: Solve for x
    x = 370,007,039,602.57/879,534
  6. Step 6: Final answer
    x = 420,685.32

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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.