Home / 280,330.95-420,065.85-190,256.61

Finding the Fourth Proportional to 280,330.95, 420,065.85 and 190,256.61

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Solution

The fourth proportional to 280,330.95, 420,065.85 and 190,256.61 is: 285,092.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,330.95 : 420,065.85 = 190,256.61 : x
  2. Step 2: Convert to fraction form
    280,330.95/420,065.85 = 190,256.61/x
  3. Step 3: Cross multiply
    280,330.95x = 420,065.85 × 190,256.61
  4. Step 4: Simplify right side
    280,330.95x = 79,920,304,597.77
  5. Step 5: Solve for x
    x = 79,920,304,597.77/280,330.95
  6. Step 6: Final answer
    x = 285,092.69

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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.