Home / 668,135.40-1,002,203.10-439,812.60

Finding the Fourth Proportional to 668,135.40, 1,002,203.10 and 439,812.60

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Solution

The fourth proportional to 668,135.40, 1,002,203.10 and 439,812.60 is: 659,718.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,135.40 : 1,002,203.10 = 439,812.60 : x
  2. Step 2: Convert to fraction form
    668,135.40/1,002,203.10 = 439,812.60/x
  3. Step 3: Cross multiply
    668,135.40x = 1,002,203.10 × 439,812.60
  4. Step 4: Simplify right side
    668,135.40x = 440,781,551,139.06
  5. Step 5: Solve for x
    x = 440,781,551,139.06/668,135.40
  6. Step 6: Final answer
    x = 659,718.90

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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.