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Finding the Fourth Proportional to 256,521.69, 384,782.54 and 69,533.19

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Solution

The fourth proportional to 256,521.69, 384,782.54 and 69,533.19 is: 104,299.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,521.69 : 384,782.54 = 69,533.19 : x
  2. Step 2: Convert to fraction form
    256,521.69/384,782.54 = 69,533.19/x
  3. Step 3: Cross multiply
    256,521.69x = 384,782.54 × 69,533.19
  4. Step 4: Simplify right side
    256,521.69x = 26,755,157,114.84
  5. Step 5: Solve for x
    x = 26,755,157,114.84/256,521.69
  6. Step 6: Final answer
    x = 104,299.79

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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.