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Finding the Fourth Proportional to 660,188.40, 989,116.20 and 541,215.60

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Solution

The fourth proportional to 660,188.40, 989,116.20 and 541,215.60 is: 810,867.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,188.40 : 989,116.20 = 541,215.60 : x
  2. Step 2: Convert to fraction form
    660,188.40/989,116.20 = 541,215.60/x
  3. Step 3: Cross multiply
    660,188.40x = 989,116.20 × 541,215.60
  4. Step 4: Simplify right side
    660,188.40x = 535,325,117,652.72
  5. Step 5: Solve for x
    x = 535,325,117,652.72/660,188.40
  6. Step 6: Final answer
    x = 810,867.20

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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.