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Finding the Fourth Proportional to 338,451.72, 507,678.26 and 85,732.26

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Solution

The fourth proportional to 338,451.72, 507,678.26 and 85,732.26 is: 128,598.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,451.72 : 507,678.26 = 85,732.26 : x
  2. Step 2: Convert to fraction form
    338,451.72/507,678.26 = 85,732.26/x
  3. Step 3: Cross multiply
    338,451.72x = 507,678.26 × 85,732.26
  4. Step 4: Simplify right side
    338,451.72x = 43,524,404,582.67
  5. Step 5: Solve for x
    x = 43,524,404,582.67/338,451.72
  6. Step 6: Final answer
    x = 128,598.56

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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.