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Finding the Fourth Proportional to 403,390.20, 605,085.30 and 107,902.20

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Solution

The fourth proportional to 403,390.20, 605,085.30 and 107,902.20 is: 161,853.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,390.20 : 605,085.30 = 107,902.20 : x
  2. Step 2: Convert to fraction form
    403,390.20/605,085.30 = 107,902.20/x
  3. Step 3: Cross multiply
    403,390.20x = 605,085.30 × 107,902.20
  4. Step 4: Simplify right side
    403,390.20x = 65,290,035,057.66
  5. Step 5: Solve for x
    x = 65,290,035,057.66/403,390.20
  6. Step 6: Final answer
    x = 161,853.30

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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.