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Finding the Fourth Proportional to 615.36, 920.28 and 557.94

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Solution

The fourth proportional to 615.36, 920.28 and 557.94 is: 834.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.36 : 920.28 = 557.94 : x
  2. Step 2: Convert to fraction form
    615.36/920.28 = 557.94/x
  3. Step 3: Cross multiply
    615.36x = 920.28 × 557.94
  4. Step 4: Simplify right side
    615.36x = 513,461.02
  5. Step 5: Solve for x
    x = 513,461.02/615.36
  6. Step 6: Final answer
    x = 834.41

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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.