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Finding the Fourth Proportional to 708,874.40, 1,063,004.40 and 288,010.40

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Solution

The fourth proportional to 708,874.40, 1,063,004.40 and 288,010.40 is: 431,890.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,874.40 : 1,063,004.40 = 288,010.40 : x
  2. Step 2: Convert to fraction form
    708,874.40/1,063,004.40 = 288,010.40/x
  3. Step 3: Cross multiply
    708,874.40x = 1,063,004.40 × 288,010.40
  4. Step 4: Simplify right side
    708,874.40x = 306,156,322,445.76
  5. Step 5: Solve for x
    x = 306,156,322,445.76/708,874.40
  6. Step 6: Final answer
    x = 431,890.79

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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.