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Finding the Fourth Proportional to 572.36, 858.51 and 279.87

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Solution

The fourth proportional to 572.36, 858.51 and 279.87 is: 419.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    572.36 : 858.51 = 279.87 : x
  2. Step 2: Convert to fraction form
    572.36/858.51 = 279.87/x
  3. Step 3: Cross multiply
    572.36x = 858.51 × 279.87
  4. Step 4: Simplify right side
    572.36x = 240,271.19
  5. Step 5: Solve for x
    x = 240,271.19/572.36
  6. Step 6: Final answer
    x = 419.79

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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.