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Finding the Fourth Proportional to 642,664.32, 886,842.60 and 370,716

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Solution

The fourth proportional to 642,664.32, 886,842.60 and 370,716 is: 511,568.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,664.32 : 886,842.60 = 370,716 : x
  2. Step 2: Convert to fraction form
    642,664.32/886,842.60 = 370,716/x
  3. Step 3: Cross multiply
    642,664.32x = 886,842.60 × 370,716
  4. Step 4: Simplify right side
    642,664.32x = 328,766,741,301.60
  5. Step 5: Solve for x
    x = 328,766,741,301.60/642,664.32
  6. Step 6: Final answer
    x = 511,568.37

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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.