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Finding the Fourth Proportional to 689.96, 1,034.94 and 435.08

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Solution

The fourth proportional to 689.96, 1,034.94 and 435.08 is: 652.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    689.96 : 1,034.94 = 435.08 : x
  2. Step 2: Convert to fraction form
    689.96/1,034.94 = 435.08/x
  3. Step 3: Cross multiply
    689.96x = 1,034.94 × 435.08
  4. Step 4: Simplify right side
    689.96x = 450,281.70
  5. Step 5: Solve for x
    x = 450,281.70/689.96
  6. Step 6: Final answer
    x = 652.62

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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.