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Finding the Fourth Proportional to 371,833.40, 513,128.68 and 210,719.12

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Solution

The fourth proportional to 371,833.40, 513,128.68 and 210,719.12 is: 290,791.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,833.40 : 513,128.68 = 210,719.12 : x
  2. Step 2: Convert to fraction form
    371,833.40/513,128.68 = 210,719.12/x
  3. Step 3: Cross multiply
    371,833.40x = 513,128.68 × 210,719.12
  4. Step 4: Simplify right side
    371,833.40x = 108,126,023,896.36
  5. Step 5: Solve for x
    x = 108,126,023,896.36/371,833.40
  6. Step 6: Final answer
    x = 290,791.59

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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.