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Finding the Fourth Proportional to 1,300,921.94, 1,953,301.21 and 725,669.21

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Solution

The fourth proportional to 1,300,921.94, 1,953,301.21 and 725,669.21 is: 1,089,573.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,300,921.94 : 1,953,301.21 = 725,669.21 : x
  2. Step 2: Convert to fraction form
    1,300,921.94/1,953,301.21 = 725,669.21/x
  3. Step 3: Cross multiply
    1,300,921.94x = 1,953,301.21 × 725,669.21
  4. Step 4: Simplify right side
    1,300,921.94x = 1,417,450,545,952.74
  5. Step 5: Solve for x
    x = 1,417,450,545,952.74/1,300,921.94
  6. Step 6: Final answer
    x = 1,089,573.86

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.