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Finding the Fourth Proportional to 438,818.76, 605,614.59 and 316,411.83

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Solution

The fourth proportional to 438,818.76, 605,614.59 and 316,411.83 is: 436,680.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,818.76 : 605,614.59 = 316,411.83 : x
  2. Step 2: Convert to fraction form
    438,818.76/605,614.59 = 316,411.83/x
  3. Step 3: Cross multiply
    438,818.76x = 605,614.59 × 316,411.83
  4. Step 4: Simplify right side
    438,818.76x = 191,623,620,696.60
  5. Step 5: Solve for x
    x = 191,623,620,696.60/438,818.76
  6. Step 6: Final answer
    x = 436,680.56

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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.