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Finding the Fourth Proportional to 399,337.52, 551,108.06 and 218,066.28

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Solution

The fourth proportional to 399,337.52, 551,108.06 and 218,066.28 is: 300,943.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,337.52 : 551,108.06 = 218,066.28 : x
  2. Step 2: Convert to fraction form
    399,337.52/551,108.06 = 218,066.28/x
  3. Step 3: Cross multiply
    399,337.52x = 551,108.06 × 218,066.28
  4. Step 4: Simplify right side
    399,337.52x = 120,178,084,522.22
  5. Step 5: Solve for x
    x = 120,178,084,522.22/399,337.52
  6. Step 6: Final answer
    x = 300,943.63

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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.