Home / 1,213.18-1,674.75-914.55

Finding the Fourth Proportional to 1,213.18, 1,674.75 and 914.55

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Solution

The fourth proportional to 1,213.18, 1,674.75 and 914.55 is: 1,262.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,213.18 : 1,674.75 = 914.55 : x
  2. Step 2: Convert to fraction form
    1,213.18/1,674.75 = 914.55/x
  3. Step 3: Cross multiply
    1,213.18x = 1,674.75 × 914.55
  4. Step 4: Simplify right side
    1,213.18x = 1,531,646.27
  5. Step 5: Solve for x
    x = 1,531,646.27/1,213.18
  6. Step 6: Final answer
    x = 1,262.50

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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.