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Finding the Fourth Proportional to 266,053.80, 399,080.70 and 248,428.20

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Solution

The fourth proportional to 266,053.80, 399,080.70 and 248,428.20 is: 372,642.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,053.80 : 399,080.70 = 248,428.20 : x
  2. Step 2: Convert to fraction form
    266,053.80/399,080.70 = 248,428.20/x
  3. Step 3: Cross multiply
    266,053.80x = 399,080.70 × 248,428.20
  4. Step 4: Simplify right side
    266,053.80x = 99,142,899,955.74
  5. Step 5: Solve for x
    x = 99,142,899,955.74/266,053.80
  6. Step 6: Final answer
    x = 372,642.30

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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.