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Finding the Fourth Proportional to 1,247,742.89, 1,721,890.35 and 674,783.06

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Solution

The fourth proportional to 1,247,742.89, 1,721,890.35 and 674,783.06 is: 931,203.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,247,742.89 : 1,721,890.35 = 674,783.06 : x
  2. Step 2: Convert to fraction form
    1,247,742.89/1,721,890.35 = 674,783.06/x
  3. Step 3: Cross multiply
    1,247,742.89x = 1,721,890.35 × 674,783.06
  4. Step 4: Simplify right side
    1,247,742.89x = 1,161,902,430,748.02
  5. Step 5: Solve for x
    x = 1,161,902,430,748.02/1,247,742.89
  6. Step 6: Final answer
    x = 931,203.41

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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.