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Finding the Fourth Proportional to 611,075.79, 843,293.70 and 339,161.22

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Solution

The fourth proportional to 611,075.79, 843,293.70 and 339,161.22 is: 468,047.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,075.79 : 843,293.70 = 339,161.22 : x
  2. Step 2: Convert to fraction form
    611,075.79/843,293.70 = 339,161.22/x
  3. Step 3: Cross multiply
    611,075.79x = 843,293.70 × 339,161.22
  4. Step 4: Simplify right side
    611,075.79x = 286,012,520,110.31
  5. Step 5: Solve for x
    x = 286,012,520,110.31/611,075.79
  6. Step 6: Final answer
    x = 468,047.54

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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.