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Finding the Fourth Proportional to 572.79, 859.54 and 207.55

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Solution

The fourth proportional to 572.79, 859.54 and 207.55 is: 311.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    572.79 : 859.54 = 207.55 : x
  2. Step 2: Convert to fraction form
    572.79/859.54 = 207.55/x
  3. Step 3: Cross multiply
    572.79x = 859.54 × 207.55
  4. Step 4: Simplify right side
    572.79x = 178,397.53
  5. Step 5: Solve for x
    x = 178,397.53/572.79
  6. Step 6: Final answer
    x = 311.45

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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.