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Finding the Fourth Proportional to 715.70, 999.55 and 715.70

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Solution

The fourth proportional to 715.70, 999.55 and 715.70 is: 999.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    715.70 : 999.55 = 715.70 : x
  2. Step 2: Convert to fraction form
    715.70/999.55 = 715.70/x
  3. Step 3: Cross multiply
    715.70x = 999.55 × 715.70
  4. Step 4: Simplify right side
    715.70x = 715,377.94
  5. Step 5: Solve for x
    x = 715,377.94/715.70
  6. Step 6: Final answer
    x = 999.55

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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.