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Finding the Fourth Proportional to 1,200.19, 1,656.40 and 676.24

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Solution

The fourth proportional to 1,200.19, 1,656.40 and 676.24 is: 933.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,200.19 : 1,656.40 = 676.24 : x
  2. Step 2: Convert to fraction form
    1,200.19/1,656.40 = 676.24/x
  3. Step 3: Cross multiply
    1,200.19x = 1,656.40 × 676.24
  4. Step 4: Simplify right side
    1,200.19x = 1,120,123.94
  5. Step 5: Solve for x
    x = 1,120,123.94/1,200.19
  6. Step 6: Final answer
    x = 933.29

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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.