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Finding the Fourth Proportional to 520,090.10, 780,135.15 and 436,109.30

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Solution

The fourth proportional to 520,090.10, 780,135.15 and 436,109.30 is: 654,163.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,090.10 : 780,135.15 = 436,109.30 : x
  2. Step 2: Convert to fraction form
    520,090.10/780,135.15 = 436,109.30/x
  3. Step 3: Cross multiply
    520,090.10x = 780,135.15 × 436,109.30
  4. Step 4: Simplify right side
    520,090.10x = 340,224,194,171.90
  5. Step 5: Solve for x
    x = 340,224,194,171.90/520,090.10
  6. Step 6: Final answer
    x = 654,163.95

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Double scale
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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.