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Finding the Fourth Proportional to 646,367.60, 891,978.84 and 374,472.56

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Solution

The fourth proportional to 646,367.60, 891,978.84 and 374,472.56 is: 516,767.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,367.60 : 891,978.84 = 374,472.56 : x
  2. Step 2: Convert to fraction form
    646,367.60/891,978.84 = 374,472.56/x
  3. Step 3: Cross multiply
    646,367.60x = 891,978.84 × 374,472.56
  4. Step 4: Simplify right side
    646,367.60x = 334,021,599,680.63
  5. Step 5: Solve for x
    x = 334,021,599,680.63/646,367.60
  6. Step 6: Final answer
    x = 516,767.24

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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.