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Finding the Fourth Proportional to 1,164.74, 1,607.28 and 640.76

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Solution

The fourth proportional to 1,164.74, 1,607.28 and 640.76 is: 884.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,164.74 : 1,607.28 = 640.76 : x
  2. Step 2: Convert to fraction form
    1,164.74/1,607.28 = 640.76/x
  3. Step 3: Cross multiply
    1,164.74x = 1,607.28 × 640.76
  4. Step 4: Simplify right side
    1,164.74x = 1,029,880.73
  5. Step 5: Solve for x
    x = 1,029,880.73/1,164.74
  6. Step 6: Final answer
    x = 884.22

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Half scale
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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.