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Finding the Fourth Proportional to 561,040.02, 774,238.06 and 306,391.20

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Solution

The fourth proportional to 561,040.02, 774,238.06 and 306,391.20 is: 422,821.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,040.02 : 774,238.06 = 306,391.20 : x
  2. Step 2: Convert to fraction form
    561,040.02/774,238.06 = 306,391.20/x
  3. Step 3: Cross multiply
    561,040.02x = 774,238.06 × 306,391.20
  4. Step 4: Simplify right side
    561,040.02x = 237,219,728,289.07
  5. Step 5: Solve for x
    x = 237,219,728,289.07/561,040.02
  6. Step 6: Final answer
    x = 422,821.40

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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.