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Finding the Fourth Proportional to 623.93, 860.85 and 402.62

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Solution

The fourth proportional to 623.93, 860.85 and 402.62 is: 555.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.93 : 860.85 = 402.62 : x
  2. Step 2: Convert to fraction form
    623.93/860.85 = 402.62/x
  3. Step 3: Cross multiply
    623.93x = 860.85 × 402.62
  4. Step 4: Simplify right side
    623.93x = 346,591.12
  5. Step 5: Solve for x
    x = 346,591.12/623.93
  6. Step 6: Final answer
    x = 555.50

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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.