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Finding the Fourth Proportional to 1,000.02, 1,379.66 and 580.14

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Solution

The fourth proportional to 1,000.02, 1,379.66 and 580.14 is: 800.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,000.02 : 1,379.66 = 580.14 : x
  2. Step 2: Convert to fraction form
    1,000.02/1,379.66 = 580.14/x
  3. Step 3: Cross multiply
    1,000.02x = 1,379.66 × 580.14
  4. Step 4: Simplify right side
    1,000.02x = 800,392.50
  5. Step 5: Solve for x
    x = 800,392.50/1,000.02
  6. Step 6: Final answer
    x = 800.38

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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.