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Finding the Fourth Proportional to 572.08, 858.08 and 389.60

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Solution

The fourth proportional to 572.08, 858.08 and 389.60 is: 584.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    572.08 : 858.08 = 389.60 : x
  2. Step 2: Convert to fraction form
    572.08/858.08 = 389.60/x
  3. Step 3: Cross multiply
    572.08x = 858.08 × 389.60
  4. Step 4: Simplify right side
    572.08x = 334,307.97
  5. Step 5: Solve for x
    x = 334,307.97/572.08
  6. Step 6: Final answer
    x = 584.37

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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.