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Finding the Fourth Proportional to 666.72, 995.16 and 618.52

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Solution

The fourth proportional to 666.72, 995.16 and 618.52 is: 923.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.72 : 995.16 = 618.52 : x
  2. Step 2: Convert to fraction form
    666.72/995.16 = 618.52/x
  3. Step 3: Cross multiply
    666.72x = 995.16 × 618.52
  4. Step 4: Simplify right side
    666.72x = 615,526.36
  5. Step 5: Solve for x
    x = 615,526.36/666.72
  6. Step 6: Final answer
    x = 923.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.