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Finding the Fourth Proportional to 519,248.40, 778,872.60 and 318,919.20

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Solution

The fourth proportional to 519,248.40, 778,872.60 and 318,919.20 is: 478,378.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,248.40 : 778,872.60 = 318,919.20 : x
  2. Step 2: Convert to fraction form
    519,248.40/778,872.60 = 318,919.20/x
  3. Step 3: Cross multiply
    519,248.40x = 778,872.60 × 318,919.20
  4. Step 4: Simplify right side
    519,248.40x = 248,397,426,493.92
  5. Step 5: Solve for x
    x = 248,397,426,493.92/519,248.40
  6. Step 6: Final answer
    x = 478,378.80

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Similar ratio
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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.