Home / 665,178.20-997,913.10-215,822.60

Finding the Fourth Proportional to 665,178.20, 997,913.10 and 215,822.60

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Solution

The fourth proportional to 665,178.20, 997,913.10 and 215,822.60 is: 323,781.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,178.20 : 997,913.10 = 215,822.60 : x
  2. Step 2: Convert to fraction form
    665,178.20/997,913.10 = 215,822.60/x
  3. Step 3: Cross multiply
    665,178.20x = 997,913.10 × 215,822.60
  4. Step 4: Simplify right side
    665,178.20x = 215,372,199,816.06
  5. Step 5: Solve for x
    x = 215,372,199,816.06/665,178.20
  6. Step 6: Final answer
    x = 323,781.21

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1.5x scale

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.