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Finding the Fourth Proportional to 478,660.48, 660,664.03 and 297,509.22

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Solution

The fourth proportional to 478,660.48, 660,664.03 and 297,509.22 is: 410,632.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,660.48 : 660,664.03 = 297,509.22 : x
  2. Step 2: Convert to fraction form
    478,660.48/660,664.03 = 297,509.22/x
  3. Step 3: Cross multiply
    478,660.48x = 660,664.03 × 297,509.22
  4. Step 4: Simplify right side
    478,660.48x = 196,553,640,247.36
  5. Step 5: Solve for x
    x = 196,553,640,247.36/478,660.48
  6. Step 6: Final answer
    x = 410,632.69

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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.