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Finding the Fourth Proportional to 399,193.28, 550,888.80 and 220,345.28

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Solution

The fourth proportional to 399,193.28, 550,888.80 and 220,345.28 is: 304,077.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,193.28 : 550,888.80 = 220,345.28 : x
  2. Step 2: Convert to fraction form
    399,193.28/550,888.80 = 220,345.28/x
  3. Step 3: Cross multiply
    399,193.28x = 550,888.80 × 220,345.28
  4. Step 4: Simplify right side
    399,193.28x = 121,385,746,884.86
  5. Step 5: Solve for x
    x = 121,385,746,884.86/399,193.28
  6. Step 6: Final answer
    x = 304,077.63

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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.