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Finding the Fourth Proportional to 843.70, 1,262.25 and 555.70

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Solution

The fourth proportional to 843.70, 1,262.25 and 555.70 is: 831.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    843.70 : 1,262.25 = 555.70 : x
  2. Step 2: Convert to fraction form
    843.70/1,262.25 = 555.70/x
  3. Step 3: Cross multiply
    843.70x = 1,262.25 × 555.70
  4. Step 4: Simplify right side
    843.70x = 701,432.33
  5. Step 5: Solve for x
    x = 701,432.33/843.70
  6. Step 6: Final answer
    x = 831.38

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1.5x scale

Why These Related Problems?

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