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Finding the Fourth Proportional to 660,358.20, 990,537.30 and 654,137.40

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Solution

The fourth proportional to 660,358.20, 990,537.30 and 654,137.40 is: 981,206.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,358.20 : 990,537.30 = 654,137.40 : x
  2. Step 2: Convert to fraction form
    660,358.20/990,537.30 = 654,137.40/x
  3. Step 3: Cross multiply
    660,358.20x = 990,537.30 × 654,137.40
  4. Step 4: Simplify right side
    660,358.20x = 647,947,494,025.02
  5. Step 5: Solve for x
    x = 647,947,494,025.02/660,358.20
  6. Step 6: Final answer
    x = 981,206.10

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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.