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Finding the Fourth Proportional to 621,497.82, 857,658.51 and 349,565.64

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Solution

The fourth proportional to 621,497.82, 857,658.51 and 349,565.64 is: 482,395.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,497.82 : 857,658.51 = 349,565.64 : x
  2. Step 2: Convert to fraction form
    621,497.82/857,658.51 = 349,565.64/x
  3. Step 3: Cross multiply
    621,497.82x = 857,658.51 × 349,565.64
  4. Step 4: Simplify right side
    621,497.82x = 299,807,945,949.60
  5. Step 5: Solve for x
    x = 299,807,945,949.60/621,497.82
  6. Step 6: Final answer
    x = 482,395.81

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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.