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Finding the Fourth Proportional to 404.63, 607.05 and 130.76

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Solution

The fourth proportional to 404.63, 607.05 and 130.76 is: 196.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    404.63 : 607.05 = 130.76 : x
  2. Step 2: Convert to fraction form
    404.63/607.05 = 130.76/x
  3. Step 3: Cross multiply
    404.63x = 607.05 × 130.76
  4. Step 4: Simplify right side
    404.63x = 79,374.82
  5. Step 5: Solve for x
    x = 79,374.82/404.63
  6. Step 6: Final answer
    x = 196.17

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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.