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Finding the Fourth Proportional to 371,505.78, 512,679.93 and 210,392.19

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Solution

The fourth proportional to 371,505.78, 512,679.93 and 210,392.19 is: 290,342.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,505.78 : 512,679.93 = 210,392.19 : x
  2. Step 2: Convert to fraction form
    371,505.78/512,679.93 = 210,392.19/x
  3. Step 3: Cross multiply
    371,505.78x = 512,679.93 × 210,392.19
  4. Step 4: Simplify right side
    371,505.78x = 107,863,853,241.75
  5. Step 5: Solve for x
    x = 107,863,853,241.75/371,505.78
  6. Step 6: Final answer
    x = 290,342.33

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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.