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Finding the Fourth Proportional to 380,363.25, 570,331.44 and 260,555.61

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Solution

The fourth proportional to 380,363.25, 570,331.44 and 260,555.61 is: 390,687.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,363.25 : 570,331.44 = 260,555.61 : x
  2. Step 2: Convert to fraction form
    380,363.25/570,331.44 = 260,555.61/x
  3. Step 3: Cross multiply
    380,363.25x = 570,331.44 × 260,555.61
  4. Step 4: Simplify right side
    380,363.25x = 148,603,056,251.38
  5. Step 5: Solve for x
    x = 148,603,056,251.38/380,363.25
  6. Step 6: Final answer
    x = 390,687.21

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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.