Home / 387,276.20-580,419.47-312,431.64

Finding the Fourth Proportional to 387,276.20, 580,419.47 and 312,431.64

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Solution

The fourth proportional to 387,276.20, 580,419.47 and 312,431.64 is: 468,248.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,276.20 : 580,419.47 = 312,431.64 : x
  2. Step 2: Convert to fraction form
    387,276.20/580,419.47 = 312,431.64/x
  3. Step 3: Cross multiply
    387,276.20x = 580,419.47 × 312,431.64
  4. Step 4: Simplify right side
    387,276.20x = 181,341,406,900.03
  5. Step 5: Solve for x
    x = 181,341,406,900.03/387,276.20
  6. Step 6: Final answer
    x = 468,248.26

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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.