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Finding the Fourth Proportional to 519,097.80, 778,589.10 and 425,440.20

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Solution

The fourth proportional to 519,097.80, 778,589.10 and 425,440.20 is: 638,113.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,097.80 : 778,589.10 = 425,440.20 : x
  2. Step 2: Convert to fraction form
    519,097.80/778,589.10 = 425,440.20/x
  3. Step 3: Cross multiply
    519,097.80x = 778,589.10 × 425,440.20
  4. Step 4: Simplify right side
    519,097.80x = 331,243,102,421.82
  5. Step 5: Solve for x
    x = 331,243,102,421.82/519,097.80
  6. Step 6: Final answer
    x = 638,113.09

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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.