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Finding the Fourth Proportional to 552,894.39, 763,018.80 and 311,192.61

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Solution

The fourth proportional to 552,894.39, 763,018.80 and 311,192.61 is: 429,459.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    552,894.39 : 763,018.80 = 311,192.61 : x
  2. Step 2: Convert to fraction form
    552,894.39/763,018.80 = 311,192.61/x
  3. Step 3: Cross multiply
    552,894.39x = 763,018.80 × 311,192.61
  4. Step 4: Simplify right side
    552,894.39x = 237,445,811,851.07
  5. Step 5: Solve for x
    x = 237,445,811,851.07/552,894.39
  6. Step 6: Final answer
    x = 429,459.61

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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.