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Finding the Fourth Proportional to 380,015.70, 570,023.55 and 99,561.30

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Solution

The fourth proportional to 380,015.70, 570,023.55 and 99,561.30 is: 149,341.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,015.70 : 570,023.55 = 99,561.30 : x
  2. Step 2: Convert to fraction form
    380,015.70/570,023.55 = 99,561.30/x
  3. Step 3: Cross multiply
    380,015.70x = 570,023.55 × 99,561.30
  4. Step 4: Simplify right side
    380,015.70x = 56,752,285,668.62
  5. Step 5: Solve for x
    x = 56,752,285,668.62/380,015.70
  6. Step 6: Final answer
    x = 149,341.95

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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.