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Finding the Fourth Proportional to 614.14, 921.22 and 570.40

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Solution

The fourth proportional to 614.14, 921.22 and 570.40 is: 855.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    614.14 : 921.22 = 570.40 : x
  2. Step 2: Convert to fraction form
    614.14/921.22 = 570.40/x
  3. Step 3: Cross multiply
    614.14x = 921.22 × 570.40
  4. Step 4: Simplify right side
    614.14x = 525,463.89
  5. Step 5: Solve for x
    x = 525,463.89/614.14
  6. Step 6: Final answer
    x = 855.61

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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.