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Finding the Fourth Proportional to 291,486.20, 402,279.64 and 170,620.16

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Solution

The fourth proportional to 291,486.20, 402,279.64 and 170,620.16 is: 235,472.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,486.20 : 402,279.64 = 170,620.16 : x
  2. Step 2: Convert to fraction form
    291,486.20/402,279.64 = 170,620.16/x
  3. Step 3: Cross multiply
    291,486.20x = 402,279.64 × 170,620.16
  4. Step 4: Simplify right side
    291,486.20x = 68,637,014,103.59
  5. Step 5: Solve for x
    x = 68,637,014,103.59/291,486.20
  6. Step 6: Final answer
    x = 235,472.61

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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.