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Finding the Fourth Proportional to 641,711.03, 885,561.47 and 351,341.40

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Solution

The fourth proportional to 641,711.03, 885,561.47 and 351,341.40 is: 484,851.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,711.03 : 885,561.47 = 351,341.40 : x
  2. Step 2: Convert to fraction form
    641,711.03/885,561.47 = 351,341.40/x
  3. Step 3: Cross multiply
    641,711.03x = 885,561.47 × 351,341.40
  4. Step 4: Simplify right side
    641,711.03x = 311,134,409,537.54
  5. Step 5: Solve for x
    x = 311,134,409,537.54/641,711.03
  6. Step 6: Final answer
    x = 484,851.28

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.