Home / 387,278.20-580,422.47-312,433.64

Finding the Fourth Proportional to 387,278.20, 580,422.47 and 312,433.64

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Solution

The fourth proportional to 387,278.20, 580,422.47 and 312,433.64 is: 468,251.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,278.20 : 580,422.47 = 312,433.64 : x
  2. Step 2: Convert to fraction form
    387,278.20/580,422.47 = 312,433.64/x
  3. Step 3: Cross multiply
    387,278.20x = 580,422.47 × 312,433.64
  4. Step 4: Simplify right side
    387,278.20x = 181,343,505,039.89
  5. Step 5: Solve for x
    x = 181,343,505,039.89/387,278.20
  6. Step 6: Final answer
    x = 468,251.26

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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.