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Finding the Fourth Proportional to 399,230.40, 550,936.80 and 220,382.40

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Solution

The fourth proportional to 399,230.40, 550,936.80 and 220,382.40 is: 304,127.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,230.40 : 550,936.80 = 220,382.40 : x
  2. Step 2: Convert to fraction form
    399,230.40/550,936.80 = 220,382.40/x
  3. Step 3: Cross multiply
    399,230.40x = 550,936.80 × 220,382.40
  4. Step 4: Simplify right side
    399,230.40x = 121,416,774,232.32
  5. Step 5: Solve for x
    x = 121,416,774,232.32/399,230.40
  6. Step 6: Final answer
    x = 304,127.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.