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Finding the Fourth Proportional to 434.68, 651.78 and 146

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Solution

The fourth proportional to 434.68, 651.78 and 146 is: 218.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    434.68 : 651.78 = 146 : x
  2. Step 2: Convert to fraction form
    434.68/651.78 = 146/x
  3. Step 3: Cross multiply
    434.68x = 651.78 × 146
  4. Step 4: Simplify right side
    434.68x = 95,159.88
  5. Step 5: Solve for x
    x = 95,159.88/434.68
  6. Step 6: Final answer
    x = 218.92

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.