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Finding the Fourth Proportional to 953.79, 1,315.76 and 603.87

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Solution

The fourth proportional to 953.79, 1,315.76 and 603.87 is: 833.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    953.79 : 1,315.76 = 603.87 : x
  2. Step 2: Convert to fraction form
    953.79/1,315.76 = 603.87/x
  3. Step 3: Cross multiply
    953.79x = 1,315.76 × 603.87
  4. Step 4: Simplify right side
    953.79x = 794,544.97
  5. Step 5: Solve for x
    x = 794,544.97/953.79
  6. Step 6: Final answer
    x = 833.04

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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.