Home / 305,583.45-458,539.20-128,108.40

Finding the Fourth Proportional to 305,583.45, 458,539.20 and 128,108.40

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Solution

The fourth proportional to 305,583.45, 458,539.20 and 128,108.40 is: 192,231.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,583.45 : 458,539.20 = 128,108.40 : x
  2. Step 2: Convert to fraction form
    305,583.45/458,539.20 = 128,108.40/x
  3. Step 3: Cross multiply
    305,583.45x = 458,539.20 × 128,108.40
  4. Step 4: Simplify right side
    305,583.45x = 58,742,723,249.28
  5. Step 5: Solve for x
    x = 58,742,723,249.28/305,583.45
  6. Step 6: Final answer
    x = 192,231.36

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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.