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Finding the Fourth Proportional to 425,735.63, 638,902.70 and 385,034.55

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Solution

The fourth proportional to 425,735.63, 638,902.70 and 385,034.55 is: 577,822.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,735.63 : 638,902.70 = 385,034.55 : x
  2. Step 2: Convert to fraction form
    425,735.63/638,902.70 = 385,034.55/x
  3. Step 3: Cross multiply
    425,735.63x = 638,902.70 × 385,034.55
  4. Step 4: Simplify right side
    425,735.63x = 245,999,613,588.29
  5. Step 5: Solve for x
    x = 245,999,613,588.29/425,735.63
  6. Step 6: Final answer
    x = 577,822.47

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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.