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Finding the Fourth Proportional to 382,639.40, 573,934.80 and 129,919.40

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Solution

The fourth proportional to 382,639.40, 573,934.80 and 129,919.40 is: 194,870.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    382,639.40 : 573,934.80 = 129,919.40 : x
  2. Step 2: Convert to fraction form
    382,639.40/573,934.80 = 129,919.40/x
  3. Step 3: Cross multiply
    382,639.40x = 573,934.80 × 129,919.40
  4. Step 4: Simplify right side
    382,639.40x = 74,565,264,855.12
  5. Step 5: Solve for x
    x = 74,565,264,855.12/382,639.40
  6. Step 6: Final answer
    x = 194,870.85

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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.