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Finding the Fourth Proportional to 872,397.20, 1,308,682.20 and 303,690.80

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Solution

The fourth proportional to 872,397.20, 1,308,682.20 and 303,690.80 is: 455,566.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    872,397.20 : 1,308,682.20 = 303,690.80 : x
  2. Step 2: Convert to fraction form
    872,397.20/1,308,682.20 = 303,690.80/x
  3. Step 3: Cross multiply
    872,397.20x = 1,308,682.20 × 303,690.80
  4. Step 4: Simplify right side
    872,397.20x = 397,434,744,263.76
  5. Step 5: Solve for x
    x = 397,434,744,263.76/872,397.20
  6. Step 6: Final answer
    x = 455,566.28

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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.