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Finding the Fourth Proportional to 1,093.76, 1,509.44 and 645.88

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Solution

The fourth proportional to 1,093.76, 1,509.44 and 645.88 is: 891.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,093.76 : 1,509.44 = 645.88 : x
  2. Step 2: Convert to fraction form
    1,093.76/1,509.44 = 645.88/x
  3. Step 3: Cross multiply
    1,093.76x = 1,509.44 × 645.88
  4. Step 4: Simplify right side
    1,093.76x = 974,917.11
  5. Step 5: Solve for x
    x = 974,917.11/1,093.76
  6. Step 6: Final answer
    x = 891.34

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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.