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Finding the Fourth Proportional to 853.09, 1,177.85 and 657.07

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Solution

The fourth proportional to 853.09, 1,177.85 and 657.07 is: 907.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    853.09 : 1,177.85 = 657.07 : x
  2. Step 2: Convert to fraction form
    853.09/1,177.85 = 657.07/x
  3. Step 3: Cross multiply
    853.09x = 1,177.85 × 657.07
  4. Step 4: Simplify right side
    853.09x = 773,923.67
  5. Step 5: Solve for x
    x = 773,923.67/853.09
  6. Step 6: Final answer
    x = 907.20

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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.