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Finding the Fourth Proportional to 679,207.76, 1,019,025 and 280,036.40

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Solution

The fourth proportional to 679,207.76, 1,019,025 and 280,036.40 is: 420,142.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,207.76 : 1,019,025 = 280,036.40 : x
  2. Step 2: Convert to fraction form
    679,207.76/1,019,025 = 280,036.40/x
  3. Step 3: Cross multiply
    679,207.76x = 1,019,025 × 280,036.40
  4. Step 4: Simplify right side
    679,207.76x = 285,364,092,510
  5. Step 5: Solve for x
    x = 285,364,092,510/679,207.76
  6. Step 6: Final answer
    x = 420,142.57

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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.