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Finding the Fourth Proportional to 405.71, 608.53 and 117.11

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Solution

The fourth proportional to 405.71, 608.53 and 117.11 is: 175.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    405.71 : 608.53 = 117.11 : x
  2. Step 2: Convert to fraction form
    405.71/608.53 = 117.11/x
  3. Step 3: Cross multiply
    405.71x = 608.53 × 117.11
  4. Step 4: Simplify right side
    405.71x = 71,264.95
  5. Step 5: Solve for x
    x = 71,264.95/405.71
  6. Step 6: Final answer
    x = 175.65

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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.