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Finding the Fourth Proportional to 520,091.90, 780,137.85 and 370,015.10

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Solution

The fourth proportional to 520,091.90, 780,137.85 and 370,015.10 is: 555,022.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,091.90 : 780,137.85 = 370,015.10 : x
  2. Step 2: Convert to fraction form
    520,091.90/780,137.85 = 370,015.10/x
  3. Step 3: Cross multiply
    520,091.90x = 780,137.85 × 370,015.10
  4. Step 4: Simplify right side
    520,091.90x = 288,662,784,581.54
  5. Step 5: Solve for x
    x = 288,662,784,581.54/520,091.90
  6. Step 6: Final answer
    x = 555,022.65

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Similar ratio
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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.