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Finding the Fourth Proportional to 260,781.90, 391,075.65 and 181,661.10

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Solution

The fourth proportional to 260,781.90, 391,075.65 and 181,661.10 is: 272,423.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,781.90 : 391,075.65 = 181,661.10 : x
  2. Step 2: Convert to fraction form
    260,781.90/391,075.65 = 181,661.10/x
  3. Step 3: Cross multiply
    260,781.90x = 391,075.65 × 181,661.10
  4. Step 4: Simplify right side
    260,781.90x = 71,043,232,762.22
  5. Step 5: Solve for x
    x = 71,043,232,762.22/260,781.90
  6. Step 6: Final answer
    x = 272,423.94

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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.