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Finding the Fourth Proportional to 478,661.23, 660,665.06 and 297,509.97

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Solution

The fourth proportional to 478,661.23, 660,665.06 and 297,509.97 is: 410,633.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,661.23 : 660,665.06 = 297,509.97 : x
  2. Step 2: Convert to fraction form
    478,661.23/660,665.06 = 297,509.97/x
  3. Step 3: Cross multiply
    478,661.23x = 660,665.06 × 297,509.97
  4. Step 4: Simplify right side
    478,661.23x = 196,554,442,180.65
  5. Step 5: Solve for x
    x = 196,554,442,180.65/478,661.23
  6. Step 6: Final answer
    x = 410,633.72

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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.