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Finding the Fourth Proportional to 619.86, 921.38 and 603.24

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Solution

The fourth proportional to 619.86, 921.38 and 603.24 is: 896.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.86 : 921.38 = 603.24 : x
  2. Step 2: Convert to fraction form
    619.86/921.38 = 603.24/x
  3. Step 3: Cross multiply
    619.86x = 921.38 × 603.24
  4. Step 4: Simplify right side
    619.86x = 555,810.26
  5. Step 5: Solve for x
    x = 555,810.26/619.86
  6. Step 6: Final answer
    x = 896.67

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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.