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Finding the Fourth Proportional to 399,608.64, 551,498.07 and 218,348.14

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Solution

The fourth proportional to 399,608.64, 551,498.07 and 218,348.14 is: 301,341.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,608.64 : 551,498.07 = 218,348.14 : x
  2. Step 2: Convert to fraction form
    399,608.64/551,498.07 = 218,348.14/x
  3. Step 3: Cross multiply
    399,608.64x = 551,498.07 × 218,348.14
  4. Step 4: Simplify right side
    399,608.64x = 120,418,579,370.64
  5. Step 5: Solve for x
    x = 120,418,579,370.64/399,608.64
  6. Step 6: Final answer
    x = 301,341.28

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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.