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Finding the Fourth Proportional to 482,861.80, 666,431.75 and 278,876.07

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Solution

The fourth proportional to 482,861.80, 666,431.75 and 278,876.07 is: 384,896.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    482,861.80 : 666,431.75 = 278,876.07 : x
  2. Step 2: Convert to fraction form
    482,861.80/666,431.75 = 278,876.07/x
  3. Step 3: Cross multiply
    482,861.80x = 666,431.75 × 278,876.07
  4. Step 4: Simplify right side
    482,861.80x = 185,851,867,363.22
  5. Step 5: Solve for x
    x = 185,851,867,363.22/482,861.80
  6. Step 6: Final answer
    x = 384,896.60

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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.