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Finding the Fourth Proportional to 287,580.40, 431,370.60 and 252,588.40

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Solution

The fourth proportional to 287,580.40, 431,370.60 and 252,588.40 is: 378,882.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,580.40 : 431,370.60 = 252,588.40 : x
  2. Step 2: Convert to fraction form
    287,580.40/431,370.60 = 252,588.40/x
  3. Step 3: Cross multiply
    287,580.40x = 431,370.60 × 252,588.40
  4. Step 4: Simplify right side
    287,580.40x = 108,959,209,661.04
  5. Step 5: Solve for x
    x = 108,959,209,661.04/287,580.40
  6. Step 6: Final answer
    x = 378,882.60

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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.