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Finding the Fourth Proportional to 389,735.40, 584,165.70 and 165,057.60

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Solution

The fourth proportional to 389,735.40, 584,165.70 and 165,057.60 is: 247,401.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,735.40 : 584,165.70 = 165,057.60 : x
  2. Step 2: Convert to fraction form
    389,735.40/584,165.70 = 165,057.60/x
  3. Step 3: Cross multiply
    389,735.40x = 584,165.70 × 165,057.60
  4. Step 4: Simplify right side
    389,735.40x = 96,420,988,444.32
  5. Step 5: Solve for x
    x = 96,420,988,444.32/389,735.40
  6. Step 6: Final answer
    x = 247,401.16

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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.