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Finding the Fourth Proportional to 399,247.96, 550,962.30 and 220,399.96

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Solution

The fourth proportional to 399,247.96, 550,962.30 and 220,399.96 is: 304,152.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,247.96 : 550,962.30 = 220,399.96 : x
  2. Step 2: Convert to fraction form
    399,247.96/550,962.30 = 220,399.96/x
  3. Step 3: Cross multiply
    399,247.96x = 550,962.30 × 220,399.96
  4. Step 4: Simplify right side
    399,247.96x = 121,432,068,881.51
  5. Step 5: Solve for x
    x = 121,432,068,881.51/399,247.96
  6. Step 6: Final answer
    x = 304,152.01

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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.