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Finding the Fourth Proportional to 957.43, 1,320.51 and 722.17

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Solution

The fourth proportional to 957.43, 1,320.51 and 722.17 is: 996.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    957.43 : 1,320.51 = 722.17 : x
  2. Step 2: Convert to fraction form
    957.43/1,320.51 = 722.17/x
  3. Step 3: Cross multiply
    957.43x = 1,320.51 × 722.17
  4. Step 4: Simplify right side
    957.43x = 953,632.71
  5. Step 5: Solve for x
    x = 953,632.71/957.43
  6. Step 6: Final answer
    x = 996.03

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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.