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Finding the Fourth Proportional to 859,620.60, 1,289,430.90 and 434,467.80

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Solution

The fourth proportional to 859,620.60, 1,289,430.90 and 434,467.80 is: 651,701.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    859,620.60 : 1,289,430.90 = 434,467.80 : x
  2. Step 2: Convert to fraction form
    859,620.60/1,289,430.90 = 434,467.80/x
  3. Step 3: Cross multiply
    859,620.60x = 1,289,430.90 × 434,467.80
  4. Step 4: Simplify right side
    859,620.60x = 560,216,206,375.02
  5. Step 5: Solve for x
    x = 560,216,206,375.02/859,620.60
  6. Step 6: Final answer
    x = 651,701.70

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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.