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Finding the Fourth Proportional to 402,790.87, 604,186.35 and 191,789.11

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Solution

The fourth proportional to 402,790.87, 604,186.35 and 191,789.11 is: 287,683.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,790.87 : 604,186.35 = 191,789.11 : x
  2. Step 2: Convert to fraction form
    402,790.87/604,186.35 = 191,789.11/x
  3. Step 3: Cross multiply
    402,790.87x = 604,186.35 × 191,789.11
  4. Step 4: Simplify right side
    402,790.87x = 115,876,362,340.65
  5. Step 5: Solve for x
    x = 115,876,362,340.65/402,790.87
  6. Step 6: Final answer
    x = 287,683.69

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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.