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Finding the Fourth Proportional to 399,645.15, 551,754.71 and 260,076.74

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Solution

The fourth proportional to 399,645.15, 551,754.71 and 260,076.74 is: 359,064.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,645.15 : 551,754.71 = 260,076.74 : x
  2. Step 2: Convert to fraction form
    399,645.15/551,754.71 = 260,076.74/x
  3. Step 3: Cross multiply
    399,645.15x = 551,754.71 × 260,076.74
  4. Step 4: Simplify right side
    399,645.15x = 143,498,565,241.66
  5. Step 5: Solve for x
    x = 143,498,565,241.66/399,645.15
  6. Step 6: Final answer
    x = 359,064.95

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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.