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Finding the Fourth Proportional to 1,084.42, 1,626.70 and 435.07

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Solution

The fourth proportional to 1,084.42, 1,626.70 and 435.07 is: 652.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,084.42 : 1,626.70 = 435.07 : x
  2. Step 2: Convert to fraction form
    1,084.42/1,626.70 = 435.07/x
  3. Step 3: Cross multiply
    1,084.42x = 1,626.70 × 435.07
  4. Step 4: Simplify right side
    1,084.42x = 707,723.21
  5. Step 5: Solve for x
    x = 707,723.21/1,084.42
  6. Step 6: Final answer
    x = 652.63

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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.