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Finding the Fourth Proportional to 1,387,424.94, 1,914,955.29 and 843,445.50

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Solution

The fourth proportional to 1,387,424.94, 1,914,955.29 and 843,445.50 is: 1,164,142.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,387,424.94 : 1,914,955.29 = 843,445.50 : x
  2. Step 2: Convert to fraction form
    1,387,424.94/1,914,955.29 = 843,445.50/x
  3. Step 3: Cross multiply
    1,387,424.94x = 1,914,955.29 × 843,445.50
  4. Step 4: Simplify right side
    1,387,424.94x = 1,615,160,422,051.70
  5. Step 5: Solve for x
    x = 1,615,160,422,051.70/1,387,424.94
  6. Step 6: Final answer
    x = 1,164,142.56

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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.