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Finding the Fourth Proportional to 734.90, 978.07 and 734.90

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Solution

The fourth proportional to 734.90, 978.07 and 734.90 is: 978.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    734.90 : 978.07 = 734.90 : x
  2. Step 2: Convert to fraction form
    734.90/978.07 = 734.90/x
  3. Step 3: Cross multiply
    734.90x = 978.07 × 734.90
  4. Step 4: Simplify right side
    734.90x = 718,779.97
  5. Step 5: Solve for x
    x = 718,779.97/734.90
  6. Step 6: Final answer
    x = 978.07

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Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.