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Finding the Fourth Proportional to 835.45, 1,152.23 and 718.54

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Solution

The fourth proportional to 835.45, 1,152.23 and 718.54 is: 990.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    835.45 : 1,152.23 = 718.54 : x
  2. Step 2: Convert to fraction form
    835.45/1,152.23 = 718.54/x
  3. Step 3: Cross multiply
    835.45x = 1,152.23 × 718.54
  4. Step 4: Simplify right side
    835.45x = 827,916.87
  5. Step 5: Solve for x
    x = 827,916.87/835.45
  6. Step 6: Final answer
    x = 990.99

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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.