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Finding the Fourth Proportional to 559,287.96, 771,487.20 and 395,760.28

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Solution

The fourth proportional to 559,287.96, 771,487.20 and 395,760.28 is: 545,915.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    559,287.96 : 771,487.20 = 395,760.28 : x
  2. Step 2: Convert to fraction form
    559,287.96/771,487.20 = 395,760.28/x
  3. Step 3: Cross multiply
    559,287.96x = 771,487.20 × 395,760.28
  4. Step 4: Simplify right side
    559,287.96x = 305,323,990,288.42
  5. Step 5: Solve for x
    x = 305,323,990,288.42/559,287.96
  6. Step 6: Final answer
    x = 545,915.54

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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.