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Finding the Fourth Proportional to 478,640.32, 660,492.36 and 263,780.44

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Solution

The fourth proportional to 478,640.32, 660,492.36 and 263,780.44 is: 363,999.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,640.32 : 660,492.36 = 263,780.44 : x
  2. Step 2: Convert to fraction form
    478,640.32/660,492.36 = 263,780.44/x
  3. Step 3: Cross multiply
    478,640.32x = 660,492.36 × 263,780.44
  4. Step 4: Simplify right side
    478,640.32x = 174,224,965,337.44
  5. Step 5: Solve for x
    x = 174,224,965,337.44/478,640.32
  6. Step 6: Final answer
    x = 363,999.77

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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.