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Finding the Fourth Proportional to 703,907.88, 1,056,564.78 and 388,513.32

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Solution

The fourth proportional to 703,907.88, 1,056,564.78 and 388,513.32 is: 583,157.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    703,907.88 : 1,056,564.78 = 388,513.32 : x
  2. Step 2: Convert to fraction form
    703,907.88/1,056,564.78 = 388,513.32/x
  3. Step 3: Cross multiply
    703,907.88x = 1,056,564.78 × 388,513.32
  4. Step 4: Simplify right side
    703,907.88x = 410,489,490,472.87
  5. Step 5: Solve for x
    x = 410,489,490,472.87/703,907.88
  6. Step 6: Final answer
    x = 583,157.97

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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.