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Finding the Fourth Proportional to 957.86, 1,321.89 and 603.65

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Solution

The fourth proportional to 957.86, 1,321.89 and 603.65 is: 833.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    957.86 : 1,321.89 = 603.65 : x
  2. Step 2: Convert to fraction form
    957.86/1,321.89 = 603.65/x
  3. Step 3: Cross multiply
    957.86x = 1,321.89 × 603.65
  4. Step 4: Simplify right side
    957.86x = 797,959.94
  5. Step 5: Solve for x
    x = 797,959.94/957.86
  6. Step 6: Final answer
    x = 833.07

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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.