Home / 1,772.21-2,445.51-986.20

Finding the Fourth Proportional to 1,772.21, 2,445.51 and 986.20

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Solution

The fourth proportional to 1,772.21, 2,445.51 and 986.20 is: 1,360.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,772.21 : 2,445.51 = 986.20 : x
  2. Step 2: Convert to fraction form
    1,772.21/2,445.51 = 986.20/x
  3. Step 3: Cross multiply
    1,772.21x = 2,445.51 × 986.20
  4. Step 4: Simplify right side
    1,772.21x = 2,411,761.96
  5. Step 5: Solve for x
    x = 2,411,761.96/1,772.21
  6. Step 6: Final answer
    x = 1,360.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.