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Finding the Fourth Proportional to 1,019.08, 1,404.28 and 708.04

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Solution

The fourth proportional to 1,019.08, 1,404.28 and 708.04 is: 975.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,019.08 : 1,404.28 = 708.04 : x
  2. Step 2: Convert to fraction form
    1,019.08/1,404.28 = 708.04/x
  3. Step 3: Cross multiply
    1,019.08x = 1,404.28 × 708.04
  4. Step 4: Simplify right side
    1,019.08x = 994,286.41
  5. Step 5: Solve for x
    x = 994,286.41/1,019.08
  6. Step 6: Final answer
    x = 975.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.