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Finding the Fourth Proportional to 858.03, 1,285.66 and 337.42

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Solution

The fourth proportional to 858.03, 1,285.66 and 337.42 is: 505.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    858.03 : 1,285.66 = 337.42 : x
  2. Step 2: Convert to fraction form
    858.03/1,285.66 = 337.42/x
  3. Step 3: Cross multiply
    858.03x = 1,285.66 × 337.42
  4. Step 4: Simplify right side
    858.03x = 433,807.40
  5. Step 5: Solve for x
    x = 433,807.40/858.03
  6. Step 6: Final answer
    x = 505.59

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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.