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Finding the Fourth Proportional to 1,389,748.74, 1,917,580.51 and 873,203.34

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Solution

The fourth proportional to 1,389,748.74, 1,917,580.51 and 873,203.34 is: 1,204,849.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,389,748.74 : 1,917,580.51 = 873,203.34 : x
  2. Step 2: Convert to fraction form
    1,389,748.74/1,917,580.51 = 873,203.34/x
  3. Step 3: Cross multiply
    1,389,748.74x = 1,917,580.51 × 873,203.34
  4. Step 4: Simplify right side
    1,389,748.74x = 1,674,437,706,050.90
  5. Step 5: Solve for x
    x = 1,674,437,706,050.90/1,389,748.74
  6. Step 6: Final answer
    x = 1,204,849.23

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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.