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Finding the Fourth Proportional to 320,886.28, 479,379.23 and 207,643.96

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Solution

The fourth proportional to 320,886.28, 479,379.23 and 207,643.96 is: 310,203.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,886.28 : 479,379.23 = 207,643.96 : x
  2. Step 2: Convert to fraction form
    320,886.28/479,379.23 = 207,643.96/x
  3. Step 3: Cross multiply
    320,886.28x = 479,379.23 × 207,643.96
  4. Step 4: Simplify right side
    320,886.28x = 99,540,201,658.95
  5. Step 5: Solve for x
    x = 99,540,201,658.95/320,886.28
  6. Step 6: Final answer
    x = 310,203.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.