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Finding the Fourth Proportional to 1,772.13, 2,445.53 and 986.17

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Solution

The fourth proportional to 1,772.13, 2,445.53 and 986.17 is: 1,360.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,772.13 : 2,445.53 = 986.17 : x
  2. Step 2: Convert to fraction form
    1,772.13/2,445.53 = 986.17/x
  3. Step 3: Cross multiply
    1,772.13x = 2,445.53 × 986.17
  4. Step 4: Simplify right side
    1,772.13x = 2,411,716.90
  5. Step 5: Solve for x
    x = 2,411,716.90/1,772.13
  6. Step 6: Final answer
    x = 1,360.92

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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.