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Finding the Fourth Proportional to 900,615.80, 1,347,643.20 and 664,419.80

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Solution

The fourth proportional to 900,615.80, 1,347,643.20 and 664,419.80 is: 994,209.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    900,615.80 : 1,347,643.20 = 664,419.80 : x
  2. Step 2: Convert to fraction form
    900,615.80/1,347,643.20 = 664,419.80/x
  3. Step 3: Cross multiply
    900,615.80x = 1,347,643.20 × 664,419.80
  4. Step 4: Simplify right side
    900,615.80x = 895,400,825,415.36
  5. Step 5: Solve for x
    x = 895,400,825,415.36/900,615.80
  6. Step 6: Final answer
    x = 994,209.55

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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.