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Finding the Fourth Proportional to 256,521.75, 384,833.66 and 79,021.19

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Solution

The fourth proportional to 256,521.75, 384,833.66 and 79,021.19 is: 118,547.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,521.75 : 384,833.66 = 79,021.19 : x
  2. Step 2: Convert to fraction form
    256,521.75/384,833.66 = 79,021.19/x
  3. Step 3: Cross multiply
    256,521.75x = 384,833.66 × 79,021.19
  4. Step 4: Simplify right side
    256,521.75x = 30,410,011,445.98
  5. Step 5: Solve for x
    x = 30,410,011,445.98/256,521.75
  6. Step 6: Final answer
    x = 118,547.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.