Home / 371,780.45-513,103.53-210,687.40

Finding the Fourth Proportional to 371,780.45, 513,103.53 and 210,687.40

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Solution

The fourth proportional to 371,780.45, 513,103.53 and 210,687.40 is: 290,774.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,780.45 : 513,103.53 = 210,687.40 : x
  2. Step 2: Convert to fraction form
    371,780.45/513,103.53 = 210,687.40/x
  3. Step 3: Cross multiply
    371,780.45x = 513,103.53 × 210,687.40
  4. Step 4: Simplify right side
    371,780.45x = 108,104,448,912.86
  5. Step 5: Solve for x
    x = 108,104,448,912.86/371,780.45
  6. Step 6: Final answer
    x = 290,774.97

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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.