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Finding the Fourth Proportional to 371,877.78, 513,191.40 and 202,111.91

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Solution

The fourth proportional to 371,877.78, 513,191.40 and 202,111.91 is: 278,914.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,877.78 : 513,191.40 = 202,111.91 : x
  2. Step 2: Convert to fraction form
    371,877.78/513,191.40 = 202,111.91/x
  3. Step 3: Cross multiply
    371,877.78x = 513,191.40 × 202,111.91
  4. Step 4: Simplify right side
    371,877.78x = 103,722,092,650.17
  5. Step 5: Solve for x
    x = 103,722,092,650.17/371,877.78
  6. Step 6: Final answer
    x = 278,914.46

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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.