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Finding the Fourth Proportional to 570.01, 786.07 and 392.69

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Solution

The fourth proportional to 570.01, 786.07 and 392.69 is: 541.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    570.01 : 786.07 = 392.69 : x
  2. Step 2: Convert to fraction form
    570.01/786.07 = 392.69/x
  3. Step 3: Cross multiply
    570.01x = 786.07 × 392.69
  4. Step 4: Simplify right side
    570.01x = 308,679.86
  5. Step 5: Solve for x
    x = 308,679.86/570.01
  6. Step 6: Final answer
    x = 541.53

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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.