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Finding the Fourth Proportional to 641,862.84, 885,784.53 and 351,486.66

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Solution

The fourth proportional to 641,862.84, 885,784.53 and 351,486.66 is: 485,059.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,862.84 : 885,784.53 = 351,486.66 : x
  2. Step 2: Convert to fraction form
    641,862.84/885,784.53 = 351,486.66/x
  3. Step 3: Cross multiply
    641,862.84x = 885,784.53 × 351,486.66
  4. Step 4: Simplify right side
    641,862.84x = 311,341,445,929.37
  5. Step 5: Solve for x
    x = 311,341,445,929.37/641,862.84
  6. Step 6: Final answer
    x = 485,059.15

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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.