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Finding the Fourth Proportional to 520,432.80, 779,920.20 and 413,998.80

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Solution

The fourth proportional to 520,432.80, 779,920.20 and 413,998.80 is: 620,418.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,432.80 : 779,920.20 = 413,998.80 : x
  2. Step 2: Convert to fraction form
    520,432.80/779,920.20 = 413,998.80/x
  3. Step 3: Cross multiply
    520,432.80x = 779,920.20 × 413,998.80
  4. Step 4: Simplify right side
    520,432.80x = 322,886,026,895.76
  5. Step 5: Solve for x
    x = 322,886,026,895.76/520,432.80
  6. Step 6: Final answer
    x = 620,418.29

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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.