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Finding the Fourth Proportional to 1,098.50, 1,516.18 and 684.74

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Solution

The fourth proportional to 1,098.50, 1,516.18 and 684.74 is: 945.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,098.50 : 1,516.18 = 684.74 : x
  2. Step 2: Convert to fraction form
    1,098.50/1,516.18 = 684.74/x
  3. Step 3: Cross multiply
    1,098.50x = 1,516.18 × 684.74
  4. Step 4: Simplify right side
    1,098.50x = 1,038,189.09
  5. Step 5: Solve for x
    x = 1,038,189.09/1,098.50
  6. Step 6: Final answer
    x = 945.10

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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.