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Finding the Fourth Proportional to 256,611.47, 384,892.54 and 79,070.81

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Solution

The fourth proportional to 256,611.47, 384,892.54 and 79,070.81 is: 118,598.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,611.47 : 384,892.54 = 79,070.81 : x
  2. Step 2: Convert to fraction form
    256,611.47/384,892.54 = 79,070.81/x
  3. Step 3: Cross multiply
    256,611.47x = 384,892.54 × 79,070.81
  4. Step 4: Simplify right side
    256,611.47x = 30,433,762,976.29
  5. Step 5: Solve for x
    x = 30,433,762,976.29/256,611.47
  6. Step 6: Final answer
    x = 118,598.61

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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.