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Finding the Fourth Proportional to 287,756.38, 431,758.91 and 154,481.01

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Solution

The fourth proportional to 287,756.38, 431,758.91 and 154,481.01 is: 231,788.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,756.38 : 431,758.91 = 154,481.01 : x
  2. Step 2: Convert to fraction form
    287,756.38/431,758.91 = 154,481.01/x
  3. Step 3: Cross multiply
    287,756.38x = 431,758.91 × 154,481.01
  4. Step 4: Simplify right side
    287,756.38x = 66,698,549,562.10
  5. Step 5: Solve for x
    x = 66,698,549,562.10/287,756.38
  6. Step 6: Final answer
    x = 231,788.26

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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.