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Finding the Fourth Proportional to 321,452.55, 443,603.79 and 178,208.91

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Solution

The fourth proportional to 321,452.55, 443,603.79 and 178,208.91 is: 245,927.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,452.55 : 443,603.79 = 178,208.91 : x
  2. Step 2: Convert to fraction form
    321,452.55/443,603.79 = 178,208.91/x
  3. Step 3: Cross multiply
    321,452.55x = 443,603.79 × 178,208.91
  4. Step 4: Simplify right side
    321,452.55x = 79,054,147,887.77
  5. Step 5: Solve for x
    x = 79,054,147,887.77/321,452.55
  6. Step 6: Final answer
    x = 245,927.89

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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.