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Finding the Fourth Proportional to 876,661.60, 1,314,992.40 and 640,465.60

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Solution

The fourth proportional to 876,661.60, 1,314,992.40 and 640,465.60 is: 960,698.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    876,661.60 : 1,314,992.40 = 640,465.60 : x
  2. Step 2: Convert to fraction form
    876,661.60/1,314,992.40 = 640,465.60/x
  3. Step 3: Cross multiply
    876,661.60x = 1,314,992.40 × 640,465.60
  4. Step 4: Simplify right side
    876,661.60x = 842,207,396,461.44
  5. Step 5: Solve for x
    x = 842,207,396,461.44/876,661.60
  6. Step 6: Final answer
    x = 960,698.40

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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.