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Finding the Fourth Proportional to 924.69, 1,274.27 and 688.91

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Solution

The fourth proportional to 924.69, 1,274.27 and 688.91 is: 949.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    924.69 : 1,274.27 = 688.91 : x
  2. Step 2: Convert to fraction form
    924.69/1,274.27 = 688.91/x
  3. Step 3: Cross multiply
    924.69x = 1,274.27 × 688.91
  4. Step 4: Simplify right side
    924.69x = 877,850.44
  5. Step 5: Solve for x
    x = 877,850.44/924.69
  6. Step 6: Final answer
    x = 949.34

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Half scale
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Double 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.