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Finding the Fourth Proportional to 623.74, 860.46 and 387.50

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Solution

The fourth proportional to 623.74, 860.46 and 387.50 is: 534.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.74 : 860.46 = 387.50 : x
  2. Step 2: Convert to fraction form
    623.74/860.46 = 387.50/x
  3. Step 3: Cross multiply
    623.74x = 860.46 × 387.50
  4. Step 4: Simplify right side
    623.74x = 333,428.25
  5. Step 5: Solve for x
    x = 333,428.25/623.74
  6. Step 6: Final answer
    x = 534.56

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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.