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Finding the Fourth Proportional to 481,347.54, 664,434.09 and 280,143.54

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Solution

The fourth proportional to 481,347.54, 664,434.09 and 280,143.54 is: 386,699.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    481,347.54 : 664,434.09 = 280,143.54 : x
  2. Step 2: Convert to fraction form
    481,347.54/664,434.09 = 280,143.54/x
  3. Step 3: Cross multiply
    481,347.54x = 664,434.09 × 280,143.54
  4. Step 4: Simplify right side
    481,347.54x = 186,136,918,069.28
  5. Step 5: Solve for x
    x = 186,136,918,069.28/481,347.54
  6. Step 6: Final answer
    x = 386,699.64

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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.