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Finding the Fourth Proportional to 485,760.53, 670,120.75 and 315,932.69

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Solution

The fourth proportional to 485,760.53, 670,120.75 and 315,932.69 is: 435,838.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,760.53 : 670,120.75 = 315,932.69 : x
  2. Step 2: Convert to fraction form
    485,760.53/670,120.75 = 315,932.69/x
  3. Step 3: Cross multiply
    485,760.53x = 670,120.75 × 315,932.69
  4. Step 4: Simplify right side
    485,760.53x = 211,713,052,057.79
  5. Step 5: Solve for x
    x = 211,713,052,057.79/485,760.53
  6. Step 6: Final answer
    x = 435,838.32

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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.