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Finding the Fourth Proportional to 1,146.76, 1,582.52 and 681

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Solution

The fourth proportional to 1,146.76, 1,582.52 and 681 is: 939.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,146.76 : 1,582.52 = 681 : x
  2. Step 2: Convert to fraction form
    1,146.76/1,582.52 = 681/x
  3. Step 3: Cross multiply
    1,146.76x = 1,582.52 × 681
  4. Step 4: Simplify right side
    1,146.76x = 1,077,696.12
  5. Step 5: Solve for x
    x = 1,077,696.12/1,146.76
  6. Step 6: Final answer
    x = 939.77

Related Problems

Find fourth proportional to 573.38, 791.26 and 340.50
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.