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Finding the Fourth Proportional to 1,145.45, 1,717.41 and 528.32

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Solution

The fourth proportional to 1,145.45, 1,717.41 and 528.32 is: 792.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,145.45 : 1,717.41 = 528.32 : x
  2. Step 2: Convert to fraction form
    1,145.45/1,717.41 = 528.32/x
  3. Step 3: Cross multiply
    1,145.45x = 1,717.41 × 528.32
  4. Step 4: Simplify right side
    1,145.45x = 907,342.05
  5. Step 5: Solve for x
    x = 907,342.05/1,145.45
  6. Step 6: Final answer
    x = 792.13

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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.