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Finding the Fourth Proportional to 520,167.80, 779,085.30 and 426,855.80

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Solution

The fourth proportional to 520,167.80, 779,085.30 and 426,855.80 is: 639,326.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,167.80 : 779,085.30 = 426,855.80 : x
  2. Step 2: Convert to fraction form
    520,167.80/779,085.30 = 426,855.80/x
  3. Step 3: Cross multiply
    520,167.80x = 779,085.30 × 426,855.80
  4. Step 4: Simplify right side
    520,167.80x = 332,557,078,999.74
  5. Step 5: Solve for x
    x = 332,557,078,999.74/520,167.80
  6. Step 6: Final answer
    x = 639,326.54

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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.