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Finding the Fourth Proportional to 488.18, 731.58 and 430.28

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Solution

The fourth proportional to 488.18, 731.58 and 430.28 is: 644.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    488.18 : 731.58 = 430.28 : x
  2. Step 2: Convert to fraction form
    488.18/731.58 = 430.28/x
  3. Step 3: Cross multiply
    488.18x = 731.58 × 430.28
  4. Step 4: Simplify right side
    488.18x = 314,784.24
  5. Step 5: Solve for x
    x = 314,784.24/488.18
  6. Step 6: Final answer
    x = 644.81

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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.