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Finding the Fourth Proportional to 425,605.02, 639,130.64 and 284,357.96

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Solution

The fourth proportional to 425,605.02, 639,130.64 and 284,357.96 is: 427,020.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,605.02 : 639,130.64 = 284,357.96 : x
  2. Step 2: Convert to fraction form
    425,605.02/639,130.64 = 284,357.96/x
  3. Step 3: Cross multiply
    425,605.02x = 639,130.64 × 284,357.96
  4. Step 4: Simplify right side
    425,605.02x = 181,741,884,963.89
  5. Step 5: Solve for x
    x = 181,741,884,963.89/425,605.02
  6. Step 6: Final answer
    x = 427,020.07

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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.