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Finding the Fourth Proportional to 978.03, 1,464.33 and 762.03

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Solution

The fourth proportional to 978.03, 1,464.33 and 762.03 is: 1,140.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    978.03 : 1,464.33 = 762.03 : x
  2. Step 2: Convert to fraction form
    978.03/1,464.33 = 762.03/x
  3. Step 3: Cross multiply
    978.03x = 1,464.33 × 762.03
  4. Step 4: Simplify right side
    978.03x = 1,115,863.39
  5. Step 5: Solve for x
    x = 1,115,863.39/978.03
  6. Step 6: Final answer
    x = 1,140.93

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.