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Finding the Fourth Proportional to 554.51, 832.28 and 280.79

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Solution

The fourth proportional to 554.51, 832.28 and 280.79 is: 421.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    554.51 : 832.28 = 280.79 : x
  2. Step 2: Convert to fraction form
    554.51/832.28 = 280.79/x
  3. Step 3: Cross multiply
    554.51x = 832.28 × 280.79
  4. Step 4: Simplify right side
    554.51x = 233,695.90
  5. Step 5: Solve for x
    x = 233,695.90/554.51
  6. Step 6: Final answer
    x = 421.45

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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.