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Finding the Fourth Proportional to 1,339,698.70, 1,848,866.79 and 766,726.57

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Solution

The fourth proportional to 1,339,698.70, 1,848,866.79 and 766,726.57 is: 1,058,129.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,339,698.70 : 1,848,866.79 = 766,726.57 : x
  2. Step 2: Convert to fraction form
    1,339,698.70/1,848,866.79 = 766,726.57/x
  3. Step 3: Cross multiply
    1,339,698.70x = 1,848,866.79 × 766,726.57
  4. Step 4: Simplify right side
    1,339,698.70x = 1,417,575,292,283.61
  5. Step 5: Solve for x
    x = 1,417,575,292,283.61/1,339,698.70
  6. Step 6: Final answer
    x = 1,058,129.93

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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.