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Finding the Fourth Proportional to 390,701.88, 585,936.18 and 166,061.34

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Solution

The fourth proportional to 390,701.88, 585,936.18 and 166,061.34 is: 249,042.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,701.88 : 585,936.18 = 166,061.34 : x
  2. Step 2: Convert to fraction form
    390,701.88/585,936.18 = 166,061.34/x
  3. Step 3: Cross multiply
    390,701.88x = 585,936.18 × 166,061.34
  4. Step 4: Simplify right side
    390,701.88x = 97,301,347,205.28
  5. Step 5: Solve for x
    x = 97,301,347,205.28/390,701.88
  6. Step 6: Final answer
    x = 249,042.43

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.