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Finding the Fourth Proportional to 404.68, 607.05 and 130.78

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Solution

The fourth proportional to 404.68, 607.05 and 130.78 is: 196.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    404.68 : 607.05 = 130.78 : x
  2. Step 2: Convert to fraction form
    404.68/607.05 = 130.78/x
  3. Step 3: Cross multiply
    404.68x = 607.05 × 130.78
  4. Step 4: Simplify right side
    404.68x = 79,386.31
  5. Step 5: Solve for x
    x = 79,386.31/404.68
  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.