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Finding the Fourth Proportional to 400,378.61, 552,505.95 and 239,322.47

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Solution

The fourth proportional to 400,378.61, 552,505.95 and 239,322.47 is: 330,255.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,378.61 : 552,505.95 = 239,322.47 : x
  2. Step 2: Convert to fraction form
    400,378.61/552,505.95 = 239,322.47/x
  3. Step 3: Cross multiply
    400,378.61x = 552,505.95 × 239,322.47
  4. Step 4: Simplify right side
    400,378.61x = 132,227,085,881.17
  5. Step 5: Solve for x
    x = 132,227,085,881.17/400,378.61
  6. Step 6: Final answer
    x = 330,255.12

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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.