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Finding the Fourth Proportional to 3,585.95, 5,378.79 and 988.82

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Solution

The fourth proportional to 3,585.95, 5,378.79 and 988.82 is: 1,483.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,585.95 : 5,378.79 = 988.82 : x
  2. Step 2: Convert to fraction form
    3,585.95/5,378.79 = 988.82/x
  3. Step 3: Cross multiply
    3,585.95x = 5,378.79 × 988.82
  4. Step 4: Simplify right side
    3,585.95x = 5,318,655.13
  5. Step 5: Solve for x
    x = 5,318,655.13/3,585.95
  6. Step 6: Final answer
    x = 1,483.19

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1.5x scale

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.