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Finding the Fourth Proportional to 1,224.77, 1,690.19 and 700.79

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Solution

The fourth proportional to 1,224.77, 1,690.19 and 700.79 is: 967.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,224.77 : 1,690.19 = 700.79 : x
  2. Step 2: Convert to fraction form
    1,224.77/1,690.19 = 700.79/x
  3. Step 3: Cross multiply
    1,224.77x = 1,690.19 × 700.79
  4. Step 4: Simplify right side
    1,224.77x = 1,184,456.30
  5. Step 5: Solve for x
    x = 1,184,456.30/1,224.77
  6. Step 6: Final answer
    x = 967.09

Related Problems

Find fourth proportional to 612.38, 845.09 and 350.39
Half scale
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Double scale
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Similar ratio
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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.