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Finding the Fourth Proportional to 638,991.88, 881,852.34 and 370,719.88

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Solution

The fourth proportional to 638,991.88, 881,852.34 and 370,719.88 is: 511,618.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,991.88 : 881,852.34 = 370,719.88 : x
  2. Step 2: Convert to fraction form
    638,991.88/881,852.34 = 370,719.88/x
  3. Step 3: Cross multiply
    638,991.88x = 881,852.34 × 370,719.88
  4. Step 4: Simplify right side
    638,991.88x = 326,920,193,662.52
  5. Step 5: Solve for x
    x = 326,920,193,662.52/638,991.88
  6. Step 6: Final answer
    x = 511,618.70

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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.