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Finding the Fourth Proportional to 319,776.68, 479,411.98 and 120,074.83

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Solution

The fourth proportional to 319,776.68, 479,411.98 and 120,074.83 is: 180,017.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,776.68 : 479,411.98 = 120,074.83 : x
  2. Step 2: Convert to fraction form
    319,776.68/479,411.98 = 120,074.83/x
  3. Step 3: Cross multiply
    319,776.68x = 479,411.98 × 120,074.83
  4. Step 4: Simplify right side
    319,776.68x = 57,565,310,499.75
  5. Step 5: Solve for x
    x = 57,565,310,499.75/319,776.68
  6. Step 6: Final answer
    x = 180,017.22

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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.