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Finding the Fourth Proportional to 555,327.90, 766,382.31 and 313,620.66

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Solution

The fourth proportional to 555,327.90, 766,382.31 and 313,620.66 is: 432,813.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,327.90 : 766,382.31 = 313,620.66 : x
  2. Step 2: Convert to fraction form
    555,327.90/766,382.31 = 313,620.66/x
  3. Step 3: Cross multiply
    555,327.90x = 766,382.31 × 313,620.66
  4. Step 4: Simplify right side
    555,327.90x = 240,353,325,874.53
  5. Step 5: Solve for x
    x = 240,353,325,874.53/555,327.90
  6. Step 6: Final answer
    x = 432,813.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.