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Finding the Fourth Proportional to 824.76, 1,138.32 and 562.68

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Solution

The fourth proportional to 824.76, 1,138.32 and 562.68 is: 776.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    824.76 : 1,138.32 = 562.68 : x
  2. Step 2: Convert to fraction form
    824.76/1,138.32 = 562.68/x
  3. Step 3: Cross multiply
    824.76x = 1,138.32 × 562.68
  4. Step 4: Simplify right side
    824.76x = 640,509.90
  5. Step 5: Solve for x
    x = 640,509.90/824.76
  6. Step 6: Final answer
    x = 776.60

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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.