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Finding the Fourth Proportional to 315.86, 473.88 and 133.40

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Solution

The fourth proportional to 315.86, 473.88 and 133.40 is: 200.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    315.86 : 473.88 = 133.40 : x
  2. Step 2: Convert to fraction form
    315.86/473.88 = 133.40/x
  3. Step 3: Cross multiply
    315.86x = 473.88 × 133.40
  4. Step 4: Simplify right side
    315.86x = 63,213.22
  5. Step 5: Solve for x
    x = 63,213.22/315.86
  6. Step 6: Final answer
    x = 200.13

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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.