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Finding the Fourth Proportional to 2,390, 3,584.08 and 928.96

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Solution

The fourth proportional to 2,390, 3,584.08 and 928.96 is: 1,393.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,390 : 3,584.08 = 928.96 : x
  2. Step 2: Convert to fraction form
    2,390/3,584.08 = 928.96/x
  3. Step 3: Cross multiply
    2,390x = 3,584.08 × 928.96
  4. Step 4: Simplify right side
    2,390x = 3,329,466.96
  5. Step 5: Solve for x
    x = 3,329,466.96/2,390
  6. Step 6: Final answer
    x = 1,393.08

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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.