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Finding the Fourth Proportional to 483,256.86, 666,855.45 and 279,321

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Solution

The fourth proportional to 483,256.86, 666,855.45 and 279,321 is: 385,440.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    483,256.86 : 666,855.45 = 279,321 : x
  2. Step 2: Convert to fraction form
    483,256.86/666,855.45 = 279,321/x
  3. Step 3: Cross multiply
    483,256.86x = 666,855.45 × 279,321
  4. Step 4: Simplify right side
    483,256.86x = 186,266,731,149.45
  5. Step 5: Solve for x
    x = 186,266,731,149.45/483,256.86
  6. Step 6: Final answer
    x = 385,440.43

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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.