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Finding the Fourth Proportional to 787,907.94, 1,182,231 and 388,330.89

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Solution

The fourth proportional to 787,907.94, 1,182,231 and 388,330.89 is: 582,678.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    787,907.94 : 1,182,231 = 388,330.89 : x
  2. Step 2: Convert to fraction form
    787,907.94/1,182,231 = 388,330.89/x
  3. Step 3: Cross multiply
    787,907.94x = 1,182,231 × 388,330.89
  4. Step 4: Simplify right side
    787,907.94x = 459,096,816,415.59
  5. Step 5: Solve for x
    x = 459,096,816,415.59/787,907.94
  6. Step 6: Final answer
    x = 582,678.25

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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.