Home / 318,935.40-478,230.30-131,965.80

Finding the Fourth Proportional to 318,935.40, 478,230.30 and 131,965.80

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Solution

The fourth proportional to 318,935.40, 478,230.30 and 131,965.80 is: 197,877.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,935.40 : 478,230.30 = 131,965.80 : x
  2. Step 2: Convert to fraction form
    318,935.40/478,230.30 = 131,965.80/x
  3. Step 3: Cross multiply
    318,935.40x = 478,230.30 × 131,965.80
  4. Step 4: Simplify right side
    318,935.40x = 63,110,044,123.74
  5. Step 5: Solve for x
    x = 63,110,044,123.74/318,935.40
  6. Step 6: Final answer
    x = 197,877.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.