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Finding the Fourth Proportional to 861,448.90, 1,188,480.62 and 860,120.32

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Solution

The fourth proportional to 861,448.90, 1,188,480.62 and 860,120.32 is: 1,186,647.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,448.90 : 1,188,480.62 = 860,120.32 : x
  2. Step 2: Convert to fraction form
    861,448.90/1,188,480.62 = 860,120.32/x
  3. Step 3: Cross multiply
    861,448.90x = 1,188,480.62 × 860,120.32
  4. Step 4: Simplify right side
    861,448.90x = 1,022,236,331,188.20
  5. Step 5: Solve for x
    x = 1,022,236,331,188.20/861,448.90
  6. Step 6: Final answer
    x = 1,186,647.67

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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.