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Finding the Fourth Proportional to 738.76, 1,024.27 and 711.40

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Solution

The fourth proportional to 738.76, 1,024.27 and 711.40 is: 986.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    738.76 : 1,024.27 = 711.40 : x
  2. Step 2: Convert to fraction form
    738.76/1,024.27 = 711.40/x
  3. Step 3: Cross multiply
    738.76x = 1,024.27 × 711.40
  4. Step 4: Simplify right side
    738.76x = 728,665.68
  5. Step 5: Solve for x
    x = 728,665.68/738.76
  6. Step 6: Final answer
    x = 986.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.