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Finding the Fourth Proportional to 553,052.07, 763,182.81 and 311,326.61

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Solution

The fourth proportional to 553,052.07, 763,182.81 and 311,326.61 is: 429,614.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,052.07 : 763,182.81 = 311,326.61 : x
  2. Step 2: Convert to fraction form
    553,052.07/763,182.81 = 311,326.61/x
  3. Step 3: Cross multiply
    553,052.07x = 763,182.81 × 311,326.61
  4. Step 4: Simplify right side
    553,052.07x = 237,599,113,231.66
  5. Step 5: Solve for x
    x = 237,599,113,231.66/553,052.07
  6. Step 6: Final answer
    x = 429,614.36

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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.