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Finding the Fourth Proportional to 478,616.21, 660,490.37 and 263,756.28

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Solution

The fourth proportional to 478,616.21, 660,490.37 and 263,756.28 is: 363,983.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,616.21 : 660,490.37 = 263,756.28 : x
  2. Step 2: Convert to fraction form
    478,616.21/660,490.37 = 263,756.28/x
  3. Step 3: Cross multiply
    478,616.21x = 660,490.37 × 263,756.28
  4. Step 4: Simplify right side
    478,616.21x = 174,208,479,664.57
  5. Step 5: Solve for x
    x = 174,208,479,664.57/478,616.21
  6. Step 6: Final answer
    x = 363,983.66

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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.