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Finding the Fourth Proportional to 30.04, 40.87 and 29.87

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Solution

The fourth proportional to 30.04, 40.87 and 29.87 is: 40.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    30.04 : 40.87 = 29.87 : x
  2. Step 2: Convert to fraction form
    30.04/40.87 = 29.87/x
  3. Step 3: Cross multiply
    30.04x = 40.87 × 29.87
  4. Step 4: Simplify right side
    30.04x = 1,220.77
  5. Step 5: Solve for x
    x = 1,220.77/30.04
  6. Step 6: Final answer
    x = 40.64

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.