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Finding the Fourth Proportional to 430.80, 646.34 and 183.87

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Solution

The fourth proportional to 430.80, 646.34 and 183.87 is: 275.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    430.80 : 646.34 = 183.87 : x
  2. Step 2: Convert to fraction form
    430.80/646.34 = 183.87/x
  3. Step 3: Cross multiply
    430.80x = 646.34 × 183.87
  4. Step 4: Simplify right side
    430.80x = 118,841.62
  5. Step 5: Solve for x
    x = 118,841.62/430.80
  6. Step 6: Final answer
    x = 275.86

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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.