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Finding the Fourth Proportional to 3,582.40, 5,373.19 and 985

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Solution

The fourth proportional to 3,582.40, 5,373.19 and 985 is: 1,477.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,582.40 : 5,373.19 = 985 : x
  2. Step 2: Convert to fraction form
    3,582.40/5,373.19 = 985/x
  3. Step 3: Cross multiply
    3,582.40x = 5,373.19 × 985
  4. Step 4: Simplify right side
    3,582.40x = 5,292,592.15
  5. Step 5: Solve for x
    x = 5,292,592.15/3,582.40
  6. Step 6: Final answer
    x = 1,477.39

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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.