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Finding the Fourth Proportional to 722,065.13, 996,449.94 and 395,398.74

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Solution

The fourth proportional to 722,065.13, 996,449.94 and 395,398.74 is: 545,650.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,065.13 : 996,449.94 = 395,398.74 : x
  2. Step 2: Convert to fraction form
    722,065.13/996,449.94 = 395,398.74/x
  3. Step 3: Cross multiply
    722,065.13x = 996,449.94 × 395,398.74
  4. Step 4: Simplify right side
    722,065.13x = 393,995,050,749.08
  5. Step 5: Solve for x
    x = 393,995,050,749.08/722,065.13
  6. Step 6: Final answer
    x = 545,650.30

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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.