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Finding the Fourth Proportional to 672,310.40, 1,009,016.40 and 667,061.60

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Solution

The fourth proportional to 672,310.40, 1,009,016.40 and 667,061.60 is: 1,001,138.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    672,310.40 : 1,009,016.40 = 667,061.60 : x
  2. Step 2: Convert to fraction form
    672,310.40/1,009,016.40 = 667,061.60/x
  3. Step 3: Cross multiply
    672,310.40x = 1,009,016.40 × 667,061.60
  4. Step 4: Simplify right side
    672,310.40x = 673,076,094,210.24
  5. Step 5: Solve for x
    x = 673,076,094,210.24/672,310.40
  6. Step 6: Final answer
    x = 1,001,138.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.