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Finding the Fourth Proportional to 321,075.88, 443,080.20 and 185,110.06

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Solution

The fourth proportional to 321,075.88, 443,080.20 and 185,110.06 is: 255,449.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,075.88 : 443,080.20 = 185,110.06 : x
  2. Step 2: Convert to fraction form
    321,075.88/443,080.20 = 185,110.06/x
  3. Step 3: Cross multiply
    321,075.88x = 443,080.20 × 185,110.06
  4. Step 4: Simplify right side
    321,075.88x = 82,018,602,406.81
  5. Step 5: Solve for x
    x = 82,018,602,406.81/321,075.88
  6. Step 6: Final answer
    x = 255,449.28

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1.5x scale

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.