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Finding the Fourth Proportional to 388,451.73, 536,146.11 and 261,053.52

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Solution

The fourth proportional to 388,451.73, 536,146.11 and 261,053.52 is: 360,309.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,451.73 : 536,146.11 = 261,053.52 : x
  2. Step 2: Convert to fraction form
    388,451.73/536,146.11 = 261,053.52/x
  3. Step 3: Cross multiply
    388,451.73x = 536,146.11 × 261,053.52
  4. Step 4: Simplify right side
    388,451.73x = 139,962,829,249.81
  5. Step 5: Solve for x
    x = 139,962,829,249.81/388,451.73
  6. Step 6: Final answer
    x = 360,309.45

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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.