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Finding the Fourth Proportional to 643,620.89, 965,519.02 and 373,875.61

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Solution

The fourth proportional to 643,620.89, 965,519.02 and 373,875.61 is: 560,864.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,620.89 : 965,519.02 = 373,875.61 : x
  2. Step 2: Convert to fraction form
    643,620.89/965,519.02 = 373,875.61/x
  3. Step 3: Cross multiply
    643,620.89x = 965,519.02 × 373,875.61
  4. Step 4: Simplify right side
    643,620.89x = 360,984,010,699.72
  5. Step 5: Solve for x
    x = 360,984,010,699.72/643,620.89
  6. Step 6: Final answer
    x = 560,864.35

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.