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Finding the Fourth Proportional to 2,281.06, 3,421.59 and 638.08

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Solution

The fourth proportional to 2,281.06, 3,421.59 and 638.08 is: 957.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,281.06 : 3,421.59 = 638.08 : x
  2. Step 2: Convert to fraction form
    2,281.06/3,421.59 = 638.08/x
  3. Step 3: Cross multiply
    2,281.06x = 3,421.59 × 638.08
  4. Step 4: Simplify right side
    2,281.06x = 2,183,248.15
  5. Step 5: Solve for x
    x = 2,183,248.15/2,281.06
  6. Step 6: Final answer
    x = 957.12

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1.5x scale

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.