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Finding the Fourth Proportional to 309,900.70, 464,851.05 and 215,422.30

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Solution

The fourth proportional to 309,900.70, 464,851.05 and 215,422.30 is: 323,133.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,900.70 : 464,851.05 = 215,422.30 : x
  2. Step 2: Convert to fraction form
    309,900.70/464,851.05 = 215,422.30/x
  3. Step 3: Cross multiply
    309,900.70x = 464,851.05 × 215,422.30
  4. Step 4: Simplify right side
    309,900.70x = 100,139,282,348.42
  5. Step 5: Solve for x
    x = 100,139,282,348.42/309,900.70
  6. Step 6: Final answer
    x = 323,133.45

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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.