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Finding the Fourth Proportional to 425,709.76, 638,133.48 and 276,045

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Solution

The fourth proportional to 425,709.76, 638,133.48 and 276,045 is: 413,787.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,709.76 : 638,133.48 = 276,045 : x
  2. Step 2: Convert to fraction form
    425,709.76/638,133.48 = 276,045/x
  3. Step 3: Cross multiply
    425,709.76x = 638,133.48 × 276,045
  4. Step 4: Simplify right side
    425,709.76x = 176,153,556,486.60
  5. Step 5: Solve for x
    x = 176,153,556,486.60/425,709.76
  6. Step 6: Final answer
    x = 413,787.92

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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.