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Finding the Fourth Proportional to 985,647.60, 1,478,471.40 and 885,920.40

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Solution

The fourth proportional to 985,647.60, 1,478,471.40 and 885,920.40 is: 1,328,880.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    985,647.60 : 1,478,471.40 = 885,920.40 : x
  2. Step 2: Convert to fraction form
    985,647.60/1,478,471.40 = 885,920.40/x
  3. Step 3: Cross multiply
    985,647.60x = 1,478,471.40 × 885,920.40
  4. Step 4: Simplify right side
    985,647.60x = 1,309,807,974,076.56
  5. Step 5: Solve for x
    x = 1,309,807,974,076.56/985,647.60
  6. Step 6: Final answer
    x = 1,328,880.60

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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.