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Finding the Fourth Proportional to 395,515.89, 545,661.28 and 292,397.69

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Solution

The fourth proportional to 395,515.89, 545,661.28 and 292,397.69 is: 403,397.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,515.89 : 545,661.28 = 292,397.69 : x
  2. Step 2: Convert to fraction form
    395,515.89/545,661.28 = 292,397.69/x
  3. Step 3: Cross multiply
    395,515.89x = 545,661.28 × 292,397.69
  4. Step 4: Simplify right side
    395,515.89x = 159,550,097,794.44
  5. Step 5: Solve for x
    x = 159,550,097,794.44/395,515.89
  6. Step 6: Final answer
    x = 403,397.44

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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.