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Finding the Fourth Proportional to 611.76, 915.58 and 603.56

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Solution

The fourth proportional to 611.76, 915.58 and 603.56 is: 903.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.76 : 915.58 = 603.56 : x
  2. Step 2: Convert to fraction form
    611.76/915.58 = 603.56/x
  3. Step 3: Cross multiply
    611.76x = 915.58 × 603.56
  4. Step 4: Simplify right side
    611.76x = 552,603.64
  5. Step 5: Solve for x
    x = 552,603.64/611.76
  6. Step 6: Final answer
    x = 903.31

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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.