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Finding the Fourth Proportional to 700.65, 1,049.76 and 608.76

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Solution

The fourth proportional to 700.65, 1,049.76 and 608.76 is: 912.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    700.65 : 1,049.76 = 608.76 : x
  2. Step 2: Convert to fraction form
    700.65/1,049.76 = 608.76/x
  3. Step 3: Cross multiply
    700.65x = 1,049.76 × 608.76
  4. Step 4: Simplify right side
    700.65x = 639,051.90
  5. Step 5: Solve for x
    x = 639,051.90/700.65
  6. Step 6: Final answer
    x = 912.08

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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.