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Finding the Fourth Proportional to 700.45, 1,049.76 and 608.72

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Solution

The fourth proportional to 700.45, 1,049.76 and 608.72 is: 912.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    700.45 : 1,049.76 = 608.72 : x
  2. Step 2: Convert to fraction form
    700.45/1,049.76 = 608.72/x
  3. Step 3: Cross multiply
    700.45x = 1,049.76 × 608.72
  4. Step 4: Simplify right side
    700.45x = 639,004.66
  5. Step 5: Solve for x
    x = 639,004.66/700.45
  6. Step 6: Final answer
    x = 912.28

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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.