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Finding the Fourth Proportional to 572.77, 858.20 and 418.77

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Solution

The fourth proportional to 572.77, 858.20 and 418.77 is: 627.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    572.77 : 858.20 = 418.77 : x
  2. Step 2: Convert to fraction form
    572.77/858.20 = 418.77/x
  3. Step 3: Cross multiply
    572.77x = 858.20 × 418.77
  4. Step 4: Simplify right side
    572.77x = 359,386.32
  5. Step 5: Solve for x
    x = 359,386.32/572.77
  6. Step 6: Final answer
    x = 627.45

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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.