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Finding the Fourth Proportional to 430.32, 641.10 and 403.80

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Solution

The fourth proportional to 430.32, 641.10 and 403.80 is: 601.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    430.32 : 641.10 = 403.80 : x
  2. Step 2: Convert to fraction form
    430.32/641.10 = 403.80/x
  3. Step 3: Cross multiply
    430.32x = 641.10 × 403.80
  4. Step 4: Simplify right side
    430.32x = 258,876.18
  5. Step 5: Solve for x
    x = 258,876.18/430.32
  6. Step 6: Final answer
    x = 601.59

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.