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Finding the Fourth Proportional to 623.66, 860.60 and 358.18

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Solution

The fourth proportional to 623.66, 860.60 and 358.18 is: 494.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.66 : 860.60 = 358.18 : x
  2. Step 2: Convert to fraction form
    623.66/860.60 = 358.18/x
  3. Step 3: Cross multiply
    623.66x = 860.60 × 358.18
  4. Step 4: Simplify right side
    623.66x = 308,249.71
  5. Step 5: Solve for x
    x = 308,249.71/623.66
  6. Step 6: Final answer
    x = 494.26

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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.