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Finding the Fourth Proportional to 806,640.26, 1,210,708.08 and 407,561.52

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Solution

The fourth proportional to 806,640.26, 1,210,708.08 and 407,561.52 is: 611,720.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    806,640.26 : 1,210,708.08 = 407,561.52 : x
  2. Step 2: Convert to fraction form
    806,640.26/1,210,708.08 = 407,561.52/x
  3. Step 3: Cross multiply
    806,640.26x = 1,210,708.08 × 407,561.52
  4. Step 4: Simplify right side
    806,640.26x = 493,438,025,361.08
  5. Step 5: Solve for x
    x = 493,438,025,361.08/806,640.26
  6. Step 6: Final answer
    x = 611,720.06

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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.