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Finding the Fourth Proportional to 724.79, 999.60 and 624.62

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Solution

The fourth proportional to 724.79, 999.60 and 624.62 is: 861.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    724.79 : 999.60 = 624.62 : x
  2. Step 2: Convert to fraction form
    724.79/999.60 = 624.62/x
  3. Step 3: Cross multiply
    724.79x = 999.60 × 624.62
  4. Step 4: Simplify right side
    724.79x = 624,370.15
  5. Step 5: Solve for x
    x = 624,370.15/724.79
  6. Step 6: Final answer
    x = 861.45

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1.5x scale

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.