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Finding the Fourth Proportional to 853.49, 1,177.77 and 480.53

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Solution

The fourth proportional to 853.49, 1,177.77 and 480.53 is: 663.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    853.49 : 1,177.77 = 480.53 : x
  2. Step 2: Convert to fraction form
    853.49/1,177.77 = 480.53/x
  3. Step 3: Cross multiply
    853.49x = 1,177.77 × 480.53
  4. Step 4: Simplify right side
    853.49x = 565,953.82
  5. Step 5: Solve for x
    x = 565,953.82/853.49
  6. Step 6: Final answer
    x = 663.11

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1.5x scale

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.