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Finding the Fourth Proportional to 1,098.51, 1,516.25 and 626.67

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Solution

The fourth proportional to 1,098.51, 1,516.25 and 626.67 is: 864.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,098.51 : 1,516.25 = 626.67 : x
  2. Step 2: Convert to fraction form
    1,098.51/1,516.25 = 626.67/x
  3. Step 3: Cross multiply
    1,098.51x = 1,516.25 × 626.67
  4. Step 4: Simplify right side
    1,098.51x = 950,189.95
  5. Step 5: Solve for x
    x = 950,189.95/1,098.51
  6. Step 6: Final answer
    x = 864.98

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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.