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Finding the Fourth Proportional to 407.07, 560.54 and 397.99

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Solution

The fourth proportional to 407.07, 560.54 and 397.99 is: 548.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    407.07 : 560.54 = 397.99 : x
  2. Step 2: Convert to fraction form
    407.07/560.54 = 397.99/x
  3. Step 3: Cross multiply
    407.07x = 560.54 × 397.99
  4. Step 4: Simplify right side
    407.07x = 223,087.51
  5. Step 5: Solve for x
    x = 223,087.51/407.07
  6. Step 6: Final answer
    x = 548.04

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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.