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Finding the Fourth Proportional to 577,871.40, 866,807.10 and 388,914.60

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Solution

The fourth proportional to 577,871.40, 866,807.10 and 388,914.60 is: 583,371.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    577,871.40 : 866,807.10 = 388,914.60 : x
  2. Step 2: Convert to fraction form
    577,871.40/866,807.10 = 388,914.60/x
  3. Step 3: Cross multiply
    577,871.40x = 866,807.10 × 388,914.60
  4. Step 4: Simplify right side
    577,871.40x = 337,113,936,573.66
  5. Step 5: Solve for x
    x = 337,113,936,573.66/577,871.40
  6. Step 6: Final answer
    x = 583,371.90

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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.