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Finding the Fourth Proportional to 829.40, 1,144.02 and 580.28

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Solution

The fourth proportional to 829.40, 1,144.02 and 580.28 is: 800.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    829.40 : 1,144.02 = 580.28 : x
  2. Step 2: Convert to fraction form
    829.40/1,144.02 = 580.28/x
  3. Step 3: Cross multiply
    829.40x = 1,144.02 × 580.28
  4. Step 4: Simplify right side
    829.40x = 663,851.93
  5. Step 5: Solve for x
    x = 663,851.93/829.40
  6. Step 6: Final answer
    x = 800.40

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Double scale
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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.