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Finding the Fourth Proportional to 318,856.46, 440,012.91 and 173,658.95

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Solution

The fourth proportional to 318,856.46, 440,012.91 and 173,658.95 is: 239,644.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,856.46 : 440,012.91 = 173,658.95 : x
  2. Step 2: Convert to fraction form
    318,856.46/440,012.91 = 173,658.95/x
  3. Step 3: Cross multiply
    318,856.46x = 440,012.91 × 173,658.95
  4. Step 4: Simplify right side
    318,856.46x = 76,412,179,937.04
  5. Step 5: Solve for x
    x = 76,412,179,937.04/318,856.46
  6. Step 6: Final answer
    x = 239,644.45

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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.