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Finding the Fourth Proportional to 1,339,849.81, 1,849,075.46 and 766,876.87

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Solution

The fourth proportional to 1,339,849.81, 1,849,075.46 and 766,876.87 is: 1,058,337.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,339,849.81 : 1,849,075.46 = 766,876.87 : x
  2. Step 2: Convert to fraction form
    1,339,849.81/1,849,075.46 = 766,876.87/x
  3. Step 3: Cross multiply
    1,339,849.81x = 1,849,075.46 × 766,876.87
  4. Step 4: Simplify right side
    1,339,849.81x = 1,418,013,201,158.61
  5. Step 5: Solve for x
    x = 1,418,013,201,158.61/1,339,849.81
  6. Step 6: Final answer
    x = 1,058,337.43

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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.