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Finding the Fourth Proportional to 519,238.40, 778,857.60 and 318,909.20

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Solution

The fourth proportional to 519,238.40, 778,857.60 and 318,909.20 is: 478,363.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,238.40 : 778,857.60 = 318,909.20 : x
  2. Step 2: Convert to fraction form
    519,238.40/778,857.60 = 318,909.20/x
  3. Step 3: Cross multiply
    519,238.40x = 778,857.60 × 318,909.20
  4. Step 4: Simplify right side
    519,238.40x = 248,384,854,129.92
  5. Step 5: Solve for x
    x = 248,384,854,129.92/519,238.40
  6. Step 6: Final answer
    x = 478,363.80

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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.