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Finding the Fourth Proportional to 371,505.21, 512,679.15 and 210,391.62

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Solution

The fourth proportional to 371,505.21, 512,679.15 and 210,391.62 is: 290,341.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,505.21 : 512,679.15 = 210,391.62 : x
  2. Step 2: Convert to fraction form
    371,505.21/512,679.15 = 210,391.62/x
  3. Step 3: Cross multiply
    371,505.21x = 512,679.15 × 210,391.62
  4. Step 4: Simplify right side
    371,505.21x = 107,863,396,908.72
  5. Step 5: Solve for x
    x = 107,863,396,908.72/371,505.21
  6. Step 6: Final answer
    x = 290,341.55

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1.5x scale

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.