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Finding the Fourth Proportional to 558,028.02, 768,712 and 404,615.42

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Solution

The fourth proportional to 558,028.02, 768,712 and 404,615.42 is: 557,378.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    558,028.02 : 768,712 = 404,615.42 : x
  2. Step 2: Convert to fraction form
    558,028.02/768,712 = 404,615.42/x
  3. Step 3: Cross multiply
    558,028.02x = 768,712 × 404,615.42
  4. Step 4: Simplify right side
    558,028.02x = 311,032,728,739.04
  5. Step 5: Solve for x
    x = 311,032,728,739.04/558,028.02
  6. Step 6: Final answer
    x = 557,378.34

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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.