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Finding the Fourth Proportional to 2,390.40, 3,585.60 and 659.03

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Solution

The fourth proportional to 2,390.40, 3,585.60 and 659.03 is: 988.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,390.40 : 3,585.60 = 659.03 : x
  2. Step 2: Convert to fraction form
    2,390.40/3,585.60 = 659.03/x
  3. Step 3: Cross multiply
    2,390.40x = 3,585.60 × 659.03
  4. Step 4: Simplify right side
    2,390.40x = 2,363,000.04
  5. Step 5: Solve for x
    x = 2,363,000.04/2,390.40
  6. Step 6: Final answer
    x = 988.54

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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.