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Finding the Fourth Proportional to 617.76, 921.06 and 603.18

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Solution

The fourth proportional to 617.76, 921.06 and 603.18 is: 899.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    617.76 : 921.06 = 603.18 : x
  2. Step 2: Convert to fraction form
    617.76/921.06 = 603.18/x
  3. Step 3: Cross multiply
    617.76x = 921.06 × 603.18
  4. Step 4: Simplify right side
    617.76x = 555,564.97
  5. Step 5: Solve for x
    x = 555,564.97/617.76
  6. Step 6: Final answer
    x = 899.32

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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.