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Finding the Fourth Proportional to 425,895.27, 638,988.71 and 189,402.81

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Solution

The fourth proportional to 425,895.27, 638,988.71 and 189,402.81 is: 284,169.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,895.27 : 638,988.71 = 189,402.81 : x
  2. Step 2: Convert to fraction form
    425,895.27/638,988.71 = 189,402.81/x
  3. Step 3: Cross multiply
    425,895.27x = 638,988.71 × 189,402.81
  4. Step 4: Simplify right side
    425,895.27x = 121,026,256,285.26
  5. Step 5: Solve for x
    x = 121,026,256,285.26/425,895.27
  6. Step 6: Final answer
    x = 284,169.05

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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.