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Finding the Fourth Proportional to 1,224.62, 1,690.10 and 700.68

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Solution

The fourth proportional to 1,224.62, 1,690.10 and 700.68 is: 967.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,224.62 : 1,690.10 = 700.68 : x
  2. Step 2: Convert to fraction form
    1,224.62/1,690.10 = 700.68/x
  3. Step 3: Cross multiply
    1,224.62x = 1,690.10 × 700.68
  4. Step 4: Simplify right side
    1,224.62x = 1,184,215.76
  5. Step 5: Solve for x
    x = 1,184,215.76/1,224.62
  6. Step 6: Final answer
    x = 967.01

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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.