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Finding the Fourth Proportional to 430.10, 644.99 and 183.15

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Solution

The fourth proportional to 430.10, 644.99 and 183.15 is: 274.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    430.10 : 644.99 = 183.15 : x
  2. Step 2: Convert to fraction form
    430.10/644.99 = 183.15/x
  3. Step 3: Cross multiply
    430.10x = 644.99 × 183.15
  4. Step 4: Simplify right side
    430.10x = 118,131.41
  5. Step 5: Solve for x
    x = 118,131.41/430.10
  6. Step 6: Final answer
    x = 274.66

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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.