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Finding the Fourth Proportional to 260,189.10, 390,320.10 and 110,428.20

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Solution

The fourth proportional to 260,189.10, 390,320.10 and 110,428.20 is: 165,657.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,189.10 : 390,320.10 = 110,428.20 : x
  2. Step 2: Convert to fraction form
    260,189.10/390,320.10 = 110,428.20/x
  3. Step 3: Cross multiply
    260,189.10x = 390,320.10 × 110,428.20
  4. Step 4: Simplify right side
    260,189.10x = 43,102,346,066.82
  5. Step 5: Solve for x
    x = 43,102,346,066.82/260,189.10
  6. Step 6: Final answer
    x = 165,657.77

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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.