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Finding the Fourth Proportional to 678,760.86, 1,018,362.76 and 323,728.74

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Solution

The fourth proportional to 678,760.86, 1,018,362.76 and 323,728.74 is: 485,698.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,760.86 : 1,018,362.76 = 323,728.74 : x
  2. Step 2: Convert to fraction form
    678,760.86/1,018,362.76 = 323,728.74/x
  3. Step 3: Cross multiply
    678,760.86x = 1,018,362.76 × 323,728.74
  4. Step 4: Simplify right side
    678,760.86x = 329,673,293,157.72
  5. Step 5: Solve for x
    x = 329,673,293,157.72/678,760.86
  6. Step 6: Final answer
    x = 485,698.74

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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.