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Finding the Fourth Proportional to 380,115.48, 570,280.88 and 190,346.76

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Solution

The fourth proportional to 380,115.48, 570,280.88 and 190,346.76 is: 285,574.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,115.48 : 570,280.88 = 190,346.76 : x
  2. Step 2: Convert to fraction form
    380,115.48/570,280.88 = 190,346.76/x
  3. Step 3: Cross multiply
    380,115.48x = 570,280.88 × 190,346.76
  4. Step 4: Simplify right side
    380,115.48x = 108,551,117,797.95
  5. Step 5: Solve for x
    x = 108,551,117,797.95/380,115.48
  6. Step 6: Final answer
    x = 285,574.05

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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.