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Finding the Fourth Proportional to 385,945.70, 532,203.53 and 305,245.40

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Solution

The fourth proportional to 385,945.70, 532,203.53 and 305,245.40 is: 420,921.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,945.70 : 532,203.53 = 305,245.40 : x
  2. Step 2: Convert to fraction form
    385,945.70/532,203.53 = 305,245.40/x
  3. Step 3: Cross multiply
    385,945.70x = 532,203.53 × 305,245.40
  4. Step 4: Simplify right side
    385,945.70x = 162,452,681,489.88
  5. Step 5: Solve for x
    x = 162,452,681,489.88/385,945.70
  6. Step 6: Final answer
    x = 420,921.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.