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Finding the Fourth Proportional to 261,779.75, 392,669.57 and 74,791.25

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Solution

The fourth proportional to 261,779.75, 392,669.57 and 74,791.25 is: 112,186.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,779.75 : 392,669.57 = 74,791.25 : x
  2. Step 2: Convert to fraction form
    261,779.75/392,669.57 = 74,791.25/x
  3. Step 3: Cross multiply
    261,779.75x = 392,669.57 × 74,791.25
  4. Step 4: Simplify right side
    261,779.75x = 29,368,246,200.89
  5. Step 5: Solve for x
    x = 29,368,246,200.89/261,779.75
  6. Step 6: Final answer
    x = 112,186.85

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1.5x scale

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.