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Finding the Fourth Proportional to 700.88, 1,051.32 and 666.32

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Solution

The fourth proportional to 700.88, 1,051.32 and 666.32 is: 999.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    700.88 : 1,051.32 = 666.32 : x
  2. Step 2: Convert to fraction form
    700.88/1,051.32 = 666.32/x
  3. Step 3: Cross multiply
    700.88x = 1,051.32 × 666.32
  4. Step 4: Simplify right side
    700.88x = 700,515.54
  5. Step 5: Solve for x
    x = 700,515.54/700.88
  6. Step 6: Final answer
    x = 999.48

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.