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Finding the Fourth Proportional to 645,761.19, 891,049.77 and 373,775.88

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Solution

The fourth proportional to 645,761.19, 891,049.77 and 373,775.88 is: 515,752.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,761.19 : 891,049.77 = 373,775.88 : x
  2. Step 2: Convert to fraction form
    645,761.19/891,049.77 = 373,775.88/x
  3. Step 3: Cross multiply
    645,761.19x = 891,049.77 × 373,775.88
  4. Step 4: Simplify right side
    645,761.19x = 333,052,911,905.55
  5. Step 5: Solve for x
    x = 333,052,911,905.55/645,761.19
  6. Step 6: Final answer
    x = 515,752.44

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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.