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Finding the Fourth Proportional to 321,391.08, 481,892.16 and 143,865

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Solution

The fourth proportional to 321,391.08, 481,892.16 and 143,865 is: 215,710.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,391.08 : 481,892.16 = 143,865 : x
  2. Step 2: Convert to fraction form
    321,391.08/481,892.16 = 143,865/x
  3. Step 3: Cross multiply
    321,391.08x = 481,892.16 × 143,865
  4. Step 4: Simplify right side
    321,391.08x = 69,327,415,598.40
  5. Step 5: Solve for x
    x = 69,327,415,598.40/321,391.08
  6. Step 6: Final answer
    x = 215,710.45

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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.