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Finding the Fourth Proportional to 280.41, 420.63 and 88.04

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Solution

The fourth proportional to 280.41, 420.63 and 88.04 is: 132.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    280.41 : 420.63 = 88.04 : x
  2. Step 2: Convert to fraction form
    280.41/420.63 = 88.04/x
  3. Step 3: Cross multiply
    280.41x = 420.63 × 88.04
  4. Step 4: Simplify right side
    280.41x = 37,030.16
  5. Step 5: Solve for x
    x = 37,030.16/280.41
  6. Step 6: Final answer
    x = 132.06

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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.