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Finding the Fourth Proportional to 438.01, 656.98 and 113.35

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Solution

The fourth proportional to 438.01, 656.98 and 113.35 is: 170.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    438.01 : 656.98 = 113.35 : x
  2. Step 2: Convert to fraction form
    438.01/656.98 = 113.35/x
  3. Step 3: Cross multiply
    438.01x = 656.98 × 113.35
  4. Step 4: Simplify right side
    438.01x = 74,466.76
  5. Step 5: Solve for x
    x = 74,466.76/438.01
  6. Step 6: Final answer
    x = 170.01

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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.