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Finding the Fourth Proportional to 1,178.25, 1,774.23 and 872.28

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Solution

The fourth proportional to 1,178.25, 1,774.23 and 872.28 is: 1,313.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,178.25 : 1,774.23 = 872.28 : x
  2. Step 2: Convert to fraction form
    1,178.25/1,774.23 = 872.28/x
  3. Step 3: Cross multiply
    1,178.25x = 1,774.23 × 872.28
  4. Step 4: Simplify right side
    1,178.25x = 1,547,625.34
  5. Step 5: Solve for x
    x = 1,547,625.34/1,178.25
  6. Step 6: Final answer
    x = 1,313.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.