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Finding the Fourth Proportional to 380,056.80, 569,728.80 and 143,558.40

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Solution

The fourth proportional to 380,056.80, 569,728.80 and 143,558.40 is: 215,202.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,056.80 : 569,728.80 = 143,558.40 : x
  2. Step 2: Convert to fraction form
    380,056.80/569,728.80 = 143,558.40/x
  3. Step 3: Cross multiply
    380,056.80x = 569,728.80 × 143,558.40
  4. Step 4: Simplify right side
    380,056.80x = 81,789,354,961.92
  5. Step 5: Solve for x
    x = 81,789,354,961.92/380,056.80
  6. Step 6: Final answer
    x = 215,202.98

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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.