Home / 318,384.88-439,331.11-215,243.36

Finding the Fourth Proportional to 318,384.88, 439,331.11 and 215,243.36

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Solution

The fourth proportional to 318,384.88, 439,331.11 and 215,243.36 is: 297,008.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,384.88 : 439,331.11 = 215,243.36 : x
  2. Step 2: Convert to fraction form
    318,384.88/439,331.11 = 215,243.36/x
  3. Step 3: Cross multiply
    318,384.88x = 439,331.11 × 215,243.36
  4. Step 4: Simplify right side
    318,384.88x = 94,563,103,181.66
  5. Step 5: Solve for x
    x = 94,563,103,181.66/318,384.88
  6. Step 6: Final answer
    x = 297,008.78

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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.