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Finding the Fourth Proportional to 699.22, 957.55 and 690.11

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Solution

The fourth proportional to 699.22, 957.55 and 690.11 is: 945.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    699.22 : 957.55 = 690.11 : x
  2. Step 2: Convert to fraction form
    699.22/957.55 = 690.11/x
  3. Step 3: Cross multiply
    699.22x = 957.55 × 690.11
  4. Step 4: Simplify right side
    699.22x = 660,814.83
  5. Step 5: Solve for x
    x = 660,814.83/699.22
  6. Step 6: Final answer
    x = 945.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.