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Finding the Fourth Proportional to 666.24, 918.24 and 432.96

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Solution

The fourth proportional to 666.24, 918.24 and 432.96 is: 596.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.24 : 918.24 = 432.96 : x
  2. Step 2: Convert to fraction form
    666.24/918.24 = 432.96/x
  3. Step 3: Cross multiply
    666.24x = 918.24 × 432.96
  4. Step 4: Simplify right side
    666.24x = 397,561.19
  5. Step 5: Solve for x
    x = 397,561.19/666.24
  6. Step 6: Final answer
    x = 596.72

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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.