Home / 338,430.05-507,645.08-128,074.85

Finding the Fourth Proportional to 338,430.05, 507,645.08 and 128,074.85

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Solution

The fourth proportional to 338,430.05, 507,645.08 and 128,074.85 is: 192,112.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,430.05 : 507,645.08 = 128,074.85 : x
  2. Step 2: Convert to fraction form
    338,430.05/507,645.08 = 128,074.85/x
  3. Step 3: Cross multiply
    338,430.05x = 507,645.08 × 128,074.85
  4. Step 4: Simplify right side
    338,430.05x = 65,016,566,833.86
  5. Step 5: Solve for x
    x = 65,016,566,833.86/338,430.05
  6. Step 6: Final answer
    x = 192,112.28

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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.