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Finding the Fourth Proportional to 630.34, 940.15 and 619.40

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Solution

The fourth proportional to 630.34, 940.15 and 619.40 is: 923.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.34 : 940.15 = 619.40 : x
  2. Step 2: Convert to fraction form
    630.34/940.15 = 619.40/x
  3. Step 3: Cross multiply
    630.34x = 940.15 × 619.40
  4. Step 4: Simplify right side
    630.34x = 582,328.91
  5. Step 5: Solve for x
    x = 582,328.91/630.34
  6. Step 6: Final answer
    x = 923.83

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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.