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Finding the Fourth Proportional to 473.42, 710 and 148.78

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Solution

The fourth proportional to 473.42, 710 and 148.78 is: 223.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    473.42 : 710 = 148.78 : x
  2. Step 2: Convert to fraction form
    473.42/710 = 148.78/x
  3. Step 3: Cross multiply
    473.42x = 710 × 148.78
  4. Step 4: Simplify right side
    473.42x = 105,633.80
  5. Step 5: Solve for x
    x = 105,633.80/473.42
  6. Step 6: Final answer
    x = 223.13

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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.