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Finding the Fourth Proportional to 278,610.30, 417,915.45 and 265,779.90

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Solution

The fourth proportional to 278,610.30, 417,915.45 and 265,779.90 is: 398,669.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,610.30 : 417,915.45 = 265,779.90 : x
  2. Step 2: Convert to fraction form
    278,610.30/417,915.45 = 265,779.90/x
  3. Step 3: Cross multiply
    278,610.30x = 417,915.45 × 265,779.90
  4. Step 4: Simplify right side
    278,610.30x = 111,073,526,509.46
  5. Step 5: Solve for x
    x = 111,073,526,509.46/278,610.30
  6. Step 6: Final answer
    x = 398,669.85

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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.