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Finding the Fourth Proportional to 478,864.50, 660,832.86 and 274,928.64

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Solution

The fourth proportional to 478,864.50, 660,832.86 and 274,928.64 is: 379,401.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,864.50 : 660,832.86 = 274,928.64 : x
  2. Step 2: Convert to fraction form
    478,864.50/660,832.86 = 274,928.64/x
  3. Step 3: Cross multiply
    478,864.50x = 660,832.86 × 274,928.64
  4. Step 4: Simplify right side
    478,864.50x = 181,681,879,467.11
  5. Step 5: Solve for x
    x = 181,681,879,467.11/478,864.50
  6. Step 6: Final answer
    x = 379,401.44

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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.