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Finding the Fourth Proportional to 664.02, 915.84 and 430.74

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Solution

The fourth proportional to 664.02, 915.84 and 430.74 is: 594.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    664.02 : 915.84 = 430.74 : x
  2. Step 2: Convert to fraction form
    664.02/915.84 = 430.74/x
  3. Step 3: Cross multiply
    664.02x = 915.84 × 430.74
  4. Step 4: Simplify right side
    664.02x = 394,488.92
  5. Step 5: Solve for x
    x = 394,488.92/664.02
  6. Step 6: Final answer
    x = 594.09

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.