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Finding the Fourth Proportional to 572.03, 853.68 and 557.45

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Solution

The fourth proportional to 572.03, 853.68 and 557.45 is: 831.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    572.03 : 853.68 = 557.45 : x
  2. Step 2: Convert to fraction form
    572.03/853.68 = 557.45/x
  3. Step 3: Cross multiply
    572.03x = 853.68 × 557.45
  4. Step 4: Simplify right side
    572.03x = 475,883.92
  5. Step 5: Solve for x
    x = 475,883.92/572.03
  6. Step 6: Final answer
    x = 831.92

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.