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Finding the Fourth Proportional to 378,130.68, 521,840.88 and 216,984.42

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Solution

The fourth proportional to 378,130.68, 521,840.88 and 216,984.42 is: 299,450.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,130.68 : 521,840.88 = 216,984.42 : x
  2. Step 2: Convert to fraction form
    378,130.68/521,840.88 = 216,984.42/x
  3. Step 3: Cross multiply
    378,130.68x = 521,840.88 × 216,984.42
  4. Step 4: Simplify right side
    378,130.68x = 113,231,340,679.09
  5. Step 5: Solve for x
    x = 113,231,340,679.09/378,130.68
  6. Step 6: Final answer
    x = 299,450.29

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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.