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Finding the Fourth Proportional to 335.88, 503.76 and 143.40

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Solution

The fourth proportional to 335.88, 503.76 and 143.40 is: 215.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    335.88 : 503.76 = 143.40 : x
  2. Step 2: Convert to fraction form
    335.88/503.76 = 143.40/x
  3. Step 3: Cross multiply
    335.88x = 503.76 × 143.40
  4. Step 4: Simplify right side
    335.88x = 72,239.18
  5. Step 5: Solve for x
    x = 72,239.18/335.88
  6. Step 6: Final answer
    x = 215.07

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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.