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Finding the Fourth Proportional to 1,011.69, 1,393.34 and 945.81

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Solution

The fourth proportional to 1,011.69, 1,393.34 and 945.81 is: 1,302.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,011.69 : 1,393.34 = 945.81 : x
  2. Step 2: Convert to fraction form
    1,011.69/1,393.34 = 945.81/x
  3. Step 3: Cross multiply
    1,011.69x = 1,393.34 × 945.81
  4. Step 4: Simplify right side
    1,011.69x = 1,317,830.18
  5. Step 5: Solve for x
    x = 1,317,830.18/1,011.69
  6. Step 6: Final answer
    x = 1,302.60

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Double scale
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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.