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Finding the Fourth Proportional to 720,993.36, 1,080,820.68 and 342,092.16

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Solution

The fourth proportional to 720,993.36, 1,080,820.68 and 342,092.16 is: 512,820.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,993.36 : 1,080,820.68 = 342,092.16 : x
  2. Step 2: Convert to fraction form
    720,993.36/1,080,820.68 = 342,092.16/x
  3. Step 3: Cross multiply
    720,993.36x = 1,080,820.68 × 342,092.16
  4. Step 4: Simplify right side
    720,993.36x = 369,740,280,993.87
  5. Step 5: Solve for x
    x = 369,740,280,993.87/720,993.36
  6. Step 6: Final answer
    x = 512,820.65

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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.