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Finding the Fourth Proportional to 666.07, 912.52 and 641.13

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Solution

The fourth proportional to 666.07, 912.52 and 641.13 is: 878.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.07 : 912.52 = 641.13 : x
  2. Step 2: Convert to fraction form
    666.07/912.52 = 641.13/x
  3. Step 3: Cross multiply
    666.07x = 912.52 × 641.13
  4. Step 4: Simplify right side
    666.07x = 585,040.74
  5. Step 5: Solve for x
    x = 585,040.74/666.07
  6. Step 6: Final answer
    x = 878.35

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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.