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Finding the Fourth Proportional to 1,102.71, 1,522.26 and 710.40

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Solution

The fourth proportional to 1,102.71, 1,522.26 and 710.40 is: 980.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,102.71 : 1,522.26 = 710.40 : x
  2. Step 2: Convert to fraction form
    1,102.71/1,522.26 = 710.40/x
  3. Step 3: Cross multiply
    1,102.71x = 1,522.26 × 710.40
  4. Step 4: Simplify right side
    1,102.71x = 1,081,413.50
  5. Step 5: Solve for x
    x = 1,081,413.50/1,102.71
  6. Step 6: Final answer
    x = 980.69

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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.