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Finding the Fourth Proportional to 280.44, 420.59 and 88.07

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Solution

The fourth proportional to 280.44, 420.59 and 88.07 is: 132.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    280.44 : 420.59 = 88.07 : x
  2. Step 2: Convert to fraction form
    280.44/420.59 = 88.07/x
  3. Step 3: Cross multiply
    280.44x = 420.59 × 88.07
  4. Step 4: Simplify right side
    280.44x = 37,039.48
  5. Step 5: Solve for x
    x = 37,039.48/280.44
  6. Step 6: Final answer
    x = 132.08

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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.