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Finding the Fourth Proportional to 519,713.80, 778,404.30 and 426,401.80

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Solution

The fourth proportional to 519,713.80, 778,404.30 and 426,401.80 is: 638,645.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,713.80 : 778,404.30 = 426,401.80 : x
  2. Step 2: Convert to fraction form
    519,713.80/778,404.30 = 426,401.80/x
  3. Step 3: Cross multiply
    519,713.80x = 778,404.30 × 426,401.80
  4. Step 4: Simplify right side
    519,713.80x = 331,912,994,647.74
  5. Step 5: Solve for x
    x = 331,912,994,647.74/519,713.80
  6. Step 6: Final answer
    x = 638,645.72

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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.