Home / 318,389.94-439,338.09-215,248.42

Finding the Fourth Proportional to 318,389.94, 439,338.09 and 215,248.42

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Solution

The fourth proportional to 318,389.94, 439,338.09 and 215,248.42 is: 297,015.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,389.94 : 439,338.09 = 215,248.42 : x
  2. Step 2: Convert to fraction form
    318,389.94/439,338.09 = 215,248.42/x
  3. Step 3: Cross multiply
    318,389.94x = 439,338.09 × 215,248.42
  4. Step 4: Simplify right side
    318,389.94x = 94,566,831,074.67
  5. Step 5: Solve for x
    x = 94,566,831,074.67/318,389.94
  6. Step 6: Final answer
    x = 297,015.76

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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.