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Finding the Fourth Proportional to 318,919.70, 478,437.15 and 131,950.10

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Solution

The fourth proportional to 318,919.70, 478,437.15 and 131,950.10 is: 197,948.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,919.70 : 478,437.15 = 131,950.10 : x
  2. Step 2: Convert to fraction form
    318,919.70/478,437.15 = 131,950.10/x
  3. Step 3: Cross multiply
    318,919.70x = 478,437.15 × 131,950.10
  4. Step 4: Simplify right side
    318,919.70x = 63,129,829,786.22
  5. Step 5: Solve for x
    x = 63,129,829,786.22/318,919.70
  6. Step 6: Final answer
    x = 197,948.98

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1.5x scale

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.