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Finding the Fourth Proportional to 624.26, 860.82 and 402.77

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Solution

The fourth proportional to 624.26, 860.82 and 402.77 is: 555.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    624.26 : 860.82 = 402.77 : x
  2. Step 2: Convert to fraction form
    624.26/860.82 = 402.77/x
  3. Step 3: Cross multiply
    624.26x = 860.82 × 402.77
  4. Step 4: Simplify right side
    624.26x = 346,712.47
  5. Step 5: Solve for x
    x = 346,712.47/624.26
  6. Step 6: Final answer
    x = 555.40

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.