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Finding the Fourth Proportional to 2,381.39, 3,566.87 and 990.51

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Solution

The fourth proportional to 2,381.39, 3,566.87 and 990.51 is: 1,483.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,381.39 : 3,566.87 = 990.51 : x
  2. Step 2: Convert to fraction form
    2,381.39/3,566.87 = 990.51/x
  3. Step 3: Cross multiply
    2,381.39x = 3,566.87 × 990.51
  4. Step 4: Simplify right side
    2,381.39x = 3,533,009.50
  5. Step 5: Solve for x
    x = 3,533,009.50/2,381.39
  6. Step 6: Final answer
    x = 1,483.59

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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.