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Finding the Fourth Proportional to 390,212.84, 538,580.59 and 237,218.63

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Solution

The fourth proportional to 390,212.84, 538,580.59 and 237,218.63 is: 327,414.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,212.84 : 538,580.59 = 237,218.63 : x
  2. Step 2: Convert to fraction form
    390,212.84/538,580.59 = 237,218.63/x
  3. Step 3: Cross multiply
    390,212.84x = 538,580.59 × 237,218.63
  4. Step 4: Simplify right side
    390,212.84x = 127,761,347,752.80
  5. Step 5: Solve for x
    x = 127,761,347,752.80/390,212.84
  6. Step 6: Final answer
    x = 327,414.51

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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.