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Finding the Fourth Proportional to 3,585.60, 5,378.36 and 988.52

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Solution

The fourth proportional to 3,585.60, 5,378.36 and 988.52 is: 1,482.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,585.60 : 5,378.36 = 988.52 : x
  2. Step 2: Convert to fraction form
    3,585.60/5,378.36 = 988.52/x
  3. Step 3: Cross multiply
    3,585.60x = 5,378.36 × 988.52
  4. Step 4: Simplify right side
    3,585.60x = 5,316,584.59
  5. Step 5: Solve for x
    x = 5,316,584.59/3,585.60
  6. Step 6: Final answer
    x = 1,482.76

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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.