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Finding the Fourth Proportional to 614.15, 915.71 and 603.21

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Solution

The fourth proportional to 614.15, 915.71 and 603.21 is: 899.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    614.15 : 915.71 = 603.21 : x
  2. Step 2: Convert to fraction form
    614.15/915.71 = 603.21/x
  3. Step 3: Cross multiply
    614.15x = 915.71 × 603.21
  4. Step 4: Simplify right side
    614.15x = 552,366.94
  5. Step 5: Solve for x
    x = 552,366.94/614.15
  6. Step 6: Final answer
    x = 899.41

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.