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Finding the Fourth Proportional to 436.47, 654.80 and 143.98

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Solution

The fourth proportional to 436.47, 654.80 and 143.98 is: 216.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    436.47 : 654.80 = 143.98 : x
  2. Step 2: Convert to fraction form
    436.47/654.80 = 143.98/x
  3. Step 3: Cross multiply
    436.47x = 654.80 × 143.98
  4. Step 4: Simplify right side
    436.47x = 94,278.10
  5. Step 5: Solve for x
    x = 94,278.10/436.47
  6. Step 6: Final answer
    x = 216.00

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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.