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Finding the Fourth Proportional to 569.18, 853.74 and 553.79

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Solution

The fourth proportional to 569.18, 853.74 and 553.79 is: 830.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    569.18 : 853.74 = 553.79 : x
  2. Step 2: Convert to fraction form
    569.18/853.74 = 553.79/x
  3. Step 3: Cross multiply
    569.18x = 853.74 × 553.79
  4. Step 4: Simplify right side
    569.18x = 472,794.81
  5. Step 5: Solve for x
    x = 472,794.81/569.18
  6. Step 6: Final answer
    x = 830.66

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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.