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Finding the Fourth Proportional to 318,560.81, 439,605.84 and 173,360.42

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Solution

The fourth proportional to 318,560.81, 439,605.84 and 173,360.42 is: 239,232.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,560.81 : 439,605.84 = 173,360.42 : x
  2. Step 2: Convert to fraction form
    318,560.81/439,605.84 = 173,360.42/x
  3. Step 3: Cross multiply
    318,560.81x = 439,605.84 × 173,360.42
  4. Step 4: Simplify right side
    318,560.81x = 76,210,250,858.82
  5. Step 5: Solve for x
    x = 76,210,250,858.82/318,560.81
  6. Step 6: Final answer
    x = 239,232.98

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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.