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Finding the Fourth Proportional to 469.80, 704.86 and 145.16

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Solution

The fourth proportional to 469.80, 704.86 and 145.16 is: 217.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    469.80 : 704.86 = 145.16 : x
  2. Step 2: Convert to fraction form
    469.80/704.86 = 145.16/x
  3. Step 3: Cross multiply
    469.80x = 704.86 × 145.16
  4. Step 4: Simplify right side
    469.80x = 102,320.61
  5. Step 5: Solve for x
    x = 102,320.61/469.80
  6. Step 6: Final answer
    x = 217.80

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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.