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Finding the Fourth Proportional to 617.72, 852.58 and 407.91

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Solution

The fourth proportional to 617.72, 852.58 and 407.91 is: 563.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    617.72 : 852.58 = 407.91 : x
  2. Step 2: Convert to fraction form
    617.72/852.58 = 407.91/x
  3. Step 3: Cross multiply
    617.72x = 852.58 × 407.91
  4. Step 4: Simplify right side
    617.72x = 347,774.89
  5. Step 5: Solve for x
    x = 347,774.89/617.72
  6. Step 6: Final answer
    x = 563.00

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.