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Finding the Fourth Proportional to 623.90, 860.15 and 402.44

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Solution

The fourth proportional to 623.90, 860.15 and 402.44 is: 554.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.90 : 860.15 = 402.44 : x
  2. Step 2: Convert to fraction form
    623.90/860.15 = 402.44/x
  3. Step 3: Cross multiply
    623.90x = 860.15 × 402.44
  4. Step 4: Simplify right side
    623.90x = 346,155.47
  5. Step 5: Solve for x
    x = 346,155.47/623.90
  6. Step 6: Final answer
    x = 554.82

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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.