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Finding the Fourth Proportional to 803.34, 1,108.69 and 579.45

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Solution

The fourth proportional to 803.34, 1,108.69 and 579.45 is: 799.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    803.34 : 1,108.69 = 579.45 : x
  2. Step 2: Convert to fraction form
    803.34/1,108.69 = 579.45/x
  3. Step 3: Cross multiply
    803.34x = 1,108.69 × 579.45
  4. Step 4: Simplify right side
    803.34x = 642,433.13
  5. Step 5: Solve for x
    x = 642,433.13/803.34
  6. Step 6: Final answer
    x = 799.70

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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.