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Finding the Fourth Proportional to 288,779.79, 398,356.12 and 167,907.72

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Solution

The fourth proportional to 288,779.79, 398,356.12 and 167,907.72 is: 231,619.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,779.79 : 398,356.12 = 167,907.72 : x
  2. Step 2: Convert to fraction form
    288,779.79/398,356.12 = 167,907.72/x
  3. Step 3: Cross multiply
    288,779.79x = 398,356.12 × 167,907.72
  4. Step 4: Simplify right side
    288,779.79x = 66,887,067,857.25
  5. Step 5: Solve for x
    x = 66,887,067,857.25/288,779.79
  6. Step 6: Final answer
    x = 231,619.63

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.