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Finding the Fourth Proportional to 747,704.40, 1,121,702.40 and 321,239.40

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Solution

The fourth proportional to 747,704.40, 1,121,702.40 and 321,239.40 is: 481,921.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    747,704.40 : 1,121,702.40 = 321,239.40 : x
  2. Step 2: Convert to fraction form
    747,704.40/1,121,702.40 = 321,239.40/x
  3. Step 3: Cross multiply
    747,704.40x = 1,121,702.40 × 321,239.40
  4. Step 4: Simplify right side
    747,704.40x = 360,335,005,954.56
  5. Step 5: Solve for x
    x = 360,335,005,954.56/747,704.40
  6. Step 6: Final answer
    x = 481,921.74

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1.5x scale

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.