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Finding the Fourth Proportional to 260,626.92, 390,203.16 and 165,621.61

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Solution

The fourth proportional to 260,626.92, 390,203.16 and 165,621.61 is: 247,963.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,626.92 : 390,203.16 = 165,621.61 : x
  2. Step 2: Convert to fraction form
    260,626.92/390,203.16 = 165,621.61/x
  3. Step 3: Cross multiply
    260,626.92x = 390,203.16 × 165,621.61
  4. Step 4: Simplify right side
    260,626.92x = 64,626,075,586.29
  5. Step 5: Solve for x
    x = 64,626,075,586.29/260,626.92
  6. Step 6: Final answer
    x = 247,963.93

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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.