Home / 515,739.54-711,741.18-283,175.78

Finding the Fourth Proportional to 515,739.54, 711,741.18 and 283,175.78

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Solution

The fourth proportional to 515,739.54, 711,741.18 and 283,175.78 is: 390,793.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,739.54 : 711,741.18 = 283,175.78 : x
  2. Step 2: Convert to fraction form
    515,739.54/711,741.18 = 283,175.78/x
  3. Step 3: Cross multiply
    515,739.54x = 711,741.18 × 283,175.78
  4. Step 4: Simplify right side
    515,739.54x = 201,547,860,245.92
  5. Step 5: Solve for x
    x = 201,547,860,245.92/515,739.54
  6. Step 6: Final answer
    x = 390,793.89

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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.