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Finding the Fourth Proportional to 1,174.74, 1,621.14 and 650.76

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Solution

The fourth proportional to 1,174.74, 1,621.14 and 650.76 is: 898.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,174.74 : 1,621.14 = 650.76 : x
  2. Step 2: Convert to fraction form
    1,174.74/1,621.14 = 650.76/x
  3. Step 3: Cross multiply
    1,174.74x = 1,621.14 × 650.76
  4. Step 4: Simplify right side
    1,174.74x = 1,054,973.07
  5. Step 5: Solve for x
    x = 1,054,973.07/1,174.74
  6. Step 6: Final answer
    x = 898.05

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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.