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Finding the Fourth Proportional to 1,045.62, 1,568.42 and 429.18

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Solution

The fourth proportional to 1,045.62, 1,568.42 and 429.18 is: 643.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,045.62 : 1,568.42 = 429.18 : x
  2. Step 2: Convert to fraction form
    1,045.62/1,568.42 = 429.18/x
  3. Step 3: Cross multiply
    1,045.62x = 1,568.42 × 429.18
  4. Step 4: Simplify right side
    1,045.62x = 673,134.50
  5. Step 5: Solve for x
    x = 673,134.50/1,045.62
  6. Step 6: Final answer
    x = 643.77

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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.