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Finding the Fourth Proportional to 3,486.87, 5,230.60 and 988.07

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Solution

The fourth proportional to 3,486.87, 5,230.60 and 988.07 is: 1,482.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,486.87 : 5,230.60 = 988.07 : x
  2. Step 2: Convert to fraction form
    3,486.87/5,230.60 = 988.07/x
  3. Step 3: Cross multiply
    3,486.87x = 5,230.60 × 988.07
  4. Step 4: Simplify right side
    3,486.87x = 5,168,170.32
  5. Step 5: Solve for x
    x = 5,168,170.32/3,486.87
  6. Step 6: Final answer
    x = 1,482.18

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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.