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Finding the Fourth Proportional to 570.23, 855.62 and 261.93

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Solution

The fourth proportional to 570.23, 855.62 and 261.93 is: 393.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    570.23 : 855.62 = 261.93 : x
  2. Step 2: Convert to fraction form
    570.23/855.62 = 261.93/x
  3. Step 3: Cross multiply
    570.23x = 855.62 × 261.93
  4. Step 4: Simplify right side
    570.23x = 224,111.24
  5. Step 5: Solve for x
    x = 224,111.24/570.23
  6. Step 6: Final answer
    x = 393.02

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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.