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Finding the Fourth Proportional to 661.84, 915.10 and 579.83

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Solution

The fourth proportional to 661.84, 915.10 and 579.83 is: 801.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    661.84 : 915.10 = 579.83 : x
  2. Step 2: Convert to fraction form
    661.84/915.10 = 579.83/x
  3. Step 3: Cross multiply
    661.84x = 915.10 × 579.83
  4. Step 4: Simplify right side
    661.84x = 530,596.41
  5. Step 5: Solve for x
    x = 530,596.41/661.84
  6. Step 6: Final answer
    x = 801.70

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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.