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Finding the Fourth Proportional to 283,214.71, 390,836.41 and 155,889.39

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Solution

The fourth proportional to 283,214.71, 390,836.41 and 155,889.39 is: 215,127.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,214.71 : 390,836.41 = 155,889.39 : x
  2. Step 2: Convert to fraction form
    283,214.71/390,836.41 = 155,889.39/x
  3. Step 3: Cross multiply
    283,214.71x = 390,836.41 × 155,889.39
  4. Step 4: Simplify right side
    283,214.71x = 60,927,249,154.97
  5. Step 5: Solve for x
    x = 60,927,249,154.97/283,214.71
  6. Step 6: Final answer
    x = 215,127.42

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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.