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Finding the Fourth Proportional to 2,547.64, 3,820.86 and 986.84

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Solution

The fourth proportional to 2,547.64, 3,820.86 and 986.84 is: 1,480.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,547.64 : 3,820.86 = 986.84 : x
  2. Step 2: Convert to fraction form
    2,547.64/3,820.86 = 986.84/x
  3. Step 3: Cross multiply
    2,547.64x = 3,820.86 × 986.84
  4. Step 4: Simplify right side
    2,547.64x = 3,770,577.48
  5. Step 5: Solve for x
    x = 3,770,577.48/2,547.64
  6. Step 6: Final answer
    x = 1,480.03

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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.