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Finding the Fourth Proportional to 430.60, 646.04 and 308.76

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Solution

The fourth proportional to 430.60, 646.04 and 308.76 is: 463.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    430.60 : 646.04 = 308.76 : x
  2. Step 2: Convert to fraction form
    430.60/646.04 = 308.76/x
  3. Step 3: Cross multiply
    430.60x = 646.04 × 308.76
  4. Step 4: Simplify right side
    430.60x = 199,471.31
  5. Step 5: Solve for x
    x = 199,471.31/430.60
  6. Step 6: Final answer
    x = 463.24

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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.