Home / 378,531.13-522,384.63-217,418.50

Finding the Fourth Proportional to 378,531.13, 522,384.63 and 217,418.50

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Solution

The fourth proportional to 378,531.13, 522,384.63 and 217,418.50 is: 300,044.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,531.13 : 522,384.63 = 217,418.50 : x
  2. Step 2: Convert to fraction form
    378,531.13/522,384.63 = 217,418.50/x
  3. Step 3: Cross multiply
    378,531.13x = 522,384.63 × 217,418.50
  4. Step 4: Simplify right side
    378,531.13x = 113,576,082,677.66
  5. Step 5: Solve for x
    x = 113,576,082,677.66/378,531.13
  6. Step 6: Final answer
    x = 300,044.23

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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.