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Finding the Fourth Proportional to 520,070.30, 778,939.05 and 426,758.30

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Solution

The fourth proportional to 520,070.30, 778,939.05 and 426,758.30 is: 639,180.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,070.30 : 778,939.05 = 426,758.30 : x
  2. Step 2: Convert to fraction form
    520,070.30/778,939.05 = 426,758.30/x
  3. Step 3: Cross multiply
    520,070.30x = 778,939.05 × 426,758.30
  4. Step 4: Simplify right side
    520,070.30x = 332,418,704,781.62
  5. Step 5: Solve for x
    x = 332,418,704,781.62/520,070.30
  6. Step 6: Final answer
    x = 639,180.33

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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.