Home / 519,943.80-778,749.30-426,631.80

Finding the Fourth Proportional to 519,943.80, 778,749.30 and 426,631.80

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Solution

The fourth proportional to 519,943.80, 778,749.30 and 426,631.80 is: 638,990.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,943.80 : 778,749.30 = 426,631.80 : x
  2. Step 2: Convert to fraction form
    519,943.80/778,749.30 = 426,631.80/x
  3. Step 3: Cross multiply
    519,943.80x = 778,749.30 × 426,631.80
  4. Step 4: Simplify right side
    519,943.80x = 332,239,215,607.74
  5. Step 5: Solve for x
    x = 332,239,215,607.74/519,943.80
  6. Step 6: Final answer
    x = 638,990.63

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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.