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Finding the Fourth Proportional to 660.45, 915.58 and 625.33

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Solution

The fourth proportional to 660.45, 915.58 and 625.33 is: 866.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.45 : 915.58 = 625.33 : x
  2. Step 2: Convert to fraction form
    660.45/915.58 = 625.33/x
  3. Step 3: Cross multiply
    660.45x = 915.58 × 625.33
  4. Step 4: Simplify right side
    660.45x = 572,539.64
  5. Step 5: Solve for x
    x = 572,539.64/660.45
  6. Step 6: Final answer
    x = 866.89

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.