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Finding the Fourth Proportional to 1,247,807.89, 1,721,976.06 and 674,848.05

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Solution

The fourth proportional to 1,247,807.89, 1,721,976.06 and 674,848.05 is: 931,290.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,247,807.89 : 1,721,976.06 = 674,848.05 : x
  2. Step 2: Convert to fraction form
    1,247,807.89/1,721,976.06 = 674,848.05/x
  3. Step 3: Cross multiply
    1,247,807.89x = 1,721,976.06 × 674,848.05
  4. Step 4: Simplify right side
    1,247,807.89x = 1,162,072,186,237.68
  5. Step 5: Solve for x
    x = 1,162,072,186,237.68/1,247,807.89
  6. Step 6: Final answer
    x = 931,290.94

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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.