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Finding the Fourth Proportional to 705.30, 985.50 and 705.30

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Solution

The fourth proportional to 705.30, 985.50 and 705.30 is: 985.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    705.30 : 985.50 = 705.30 : x
  2. Step 2: Convert to fraction form
    705.30/985.50 = 705.30/x
  3. Step 3: Cross multiply
    705.30x = 985.50 × 705.30
  4. Step 4: Simplify right side
    705.30x = 695,073.15
  5. Step 5: Solve for x
    x = 695,073.15/705.30
  6. Step 6: Final answer
    x = 985.50

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.