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Finding the Fourth Proportional to 520,079.80, 778,953.30 and 426,767.80

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Solution

The fourth proportional to 520,079.80, 778,953.30 and 426,767.80 is: 639,194.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,079.80 : 778,953.30 = 426,767.80 : x
  2. Step 2: Convert to fraction form
    520,079.80/778,953.30 = 426,767.80/x
  3. Step 3: Cross multiply
    520,079.80x = 778,953.30 × 426,767.80
  4. Step 4: Simplify right side
    520,079.80x = 332,432,186,143.74
  5. Step 5: Solve for x
    x = 332,432,186,143.74/520,079.80
  6. Step 6: Final answer
    x = 639,194.57

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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.