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Finding the Fourth Proportional to 1,224.57, 1,689.94 and 700.77

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Solution

The fourth proportional to 1,224.57, 1,689.94 and 700.77 is: 967.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,224.57 : 1,689.94 = 700.77 : x
  2. Step 2: Convert to fraction form
    1,224.57/1,689.94 = 700.77/x
  3. Step 3: Cross multiply
    1,224.57x = 1,689.94 × 700.77
  4. Step 4: Simplify right side
    1,224.57x = 1,184,249.05
  5. Step 5: Solve for x
    x = 1,184,249.05/1,224.57
  6. Step 6: Final answer
    x = 967.08

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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.