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Finding the Fourth Proportional to 738.70, 1,106.44 and 430.24

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Solution

The fourth proportional to 738.70, 1,106.44 and 430.24 is: 644.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    738.70 : 1,106.44 = 430.24 : x
  2. Step 2: Convert to fraction form
    738.70/1,106.44 = 430.24/x
  3. Step 3: Cross multiply
    738.70x = 1,106.44 × 430.24
  4. Step 4: Simplify right side
    738.70x = 476,034.75
  5. Step 5: Solve for x
    x = 476,034.75/738.70
  6. Step 6: Final answer
    x = 644.42

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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.