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Finding the Fourth Proportional to 266,053.80, 399,080.70 and 255,556.20

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Solution

The fourth proportional to 266,053.80, 399,080.70 and 255,556.20 is: 383,334.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,053.80 : 399,080.70 = 255,556.20 : x
  2. Step 2: Convert to fraction form
    266,053.80/399,080.70 = 255,556.20/x
  3. Step 3: Cross multiply
    266,053.80x = 399,080.70 × 255,556.20
  4. Step 4: Simplify right side
    266,053.80x = 101,987,547,185.34
  5. Step 5: Solve for x
    x = 101,987,547,185.34/266,053.80
  6. Step 6: Final answer
    x = 383,334.30

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1.5x scale

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.