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Finding the Fourth Proportional to 456,936.40, 685,404.60 and 425,832.40

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Solution

The fourth proportional to 456,936.40, 685,404.60 and 425,832.40 is: 638,748.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    456,936.40 : 685,404.60 = 425,832.40 : x
  2. Step 2: Convert to fraction form
    456,936.40/685,404.60 = 425,832.40/x
  3. Step 3: Cross multiply
    456,936.40x = 685,404.60 × 425,832.40
  4. Step 4: Simplify right side
    456,936.40x = 291,867,485,789.04
  5. Step 5: Solve for x
    x = 291,867,485,789.04/456,936.40
  6. Step 6: Final answer
    x = 638,748.60

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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.