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Finding the Fourth Proportional to 640,729.20, 960,437.70 and 374,352.60

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Solution

The fourth proportional to 640,729.20, 960,437.70 and 374,352.60 is: 561,145.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,729.20 : 960,437.70 = 374,352.60 : x
  2. Step 2: Convert to fraction form
    640,729.20/960,437.70 = 374,352.60/x
  3. Step 3: Cross multiply
    640,729.20x = 960,437.70 × 374,352.60
  4. Step 4: Simplify right side
    640,729.20x = 359,542,350,133.02
  5. Step 5: Solve for x
    x = 359,542,350,133.02/640,729.20
  6. Step 6: Final answer
    x = 561,145.57

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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.