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Finding the Fourth Proportional to 660,261.20, 990,334.20 and 217,029.20

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Solution

The fourth proportional to 660,261.20, 990,334.20 and 217,029.20 is: 325,524.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,261.20 : 990,334.20 = 217,029.20 : x
  2. Step 2: Convert to fraction form
    660,261.20/990,334.20 = 217,029.20/x
  3. Step 3: Cross multiply
    660,261.20x = 990,334.20 × 217,029.20
  4. Step 4: Simplify right side
    660,261.20x = 214,931,439,158.64
  5. Step 5: Solve for x
    x = 214,931,439,158.64/660,261.20
  6. Step 6: Final answer
    x = 325,524.87

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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.