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Finding the Fourth Proportional to 442,896.40, 664,344.60 and 425,400.40

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Solution

The fourth proportional to 442,896.40, 664,344.60 and 425,400.40 is: 638,100.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,896.40 : 664,344.60 = 425,400.40 : x
  2. Step 2: Convert to fraction form
    442,896.40/664,344.60 = 425,400.40/x
  3. Step 3: Cross multiply
    442,896.40x = 664,344.60 × 425,400.40
  4. Step 4: Simplify right side
    442,896.40x = 282,612,458,577.84
  5. Step 5: Solve for x
    x = 282,612,458,577.84/442,896.40
  6. Step 6: Final answer
    x = 638,100.60

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1.5x scale

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.