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Finding the Fourth Proportional to 403,420.40, 605,260.20 and 270,450.80

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Solution

The fourth proportional to 403,420.40, 605,260.20 and 270,450.80 is: 405,763.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,420.40 : 605,260.20 = 270,450.80 : x
  2. Step 2: Convert to fraction form
    403,420.40/605,260.20 = 270,450.80/x
  3. Step 3: Cross multiply
    403,420.40x = 605,260.20 × 270,450.80
  4. Step 4: Simplify right side
    403,420.40x = 163,693,105,298.16
  5. Step 5: Solve for x
    x = 163,693,105,298.16/403,420.40
  6. Step 6: Final answer
    x = 405,763.08

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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.