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Finding the Fourth Proportional to 1,261,749.80, 1,888,016.70 and 929,973.80

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Solution

The fourth proportional to 1,261,749.80, 1,888,016.70 and 929,973.80 is: 1,391,564.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,261,749.80 : 1,888,016.70 = 929,973.80 : x
  2. Step 2: Convert to fraction form
    1,261,749.80/1,888,016.70 = 929,973.80/x
  3. Step 3: Cross multiply
    1,261,749.80x = 1,888,016.70 × 929,973.80
  4. Step 4: Simplify right side
    1,261,749.80x = 1,755,806,064,962.46
  5. Step 5: Solve for x
    x = 1,755,806,064,962.46/1,261,749.80
  6. Step 6: Final answer
    x = 1,391,564.37

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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.