Home / 378,904.52-522,884.90-209,135

Finding the Fourth Proportional to 378,904.52, 522,884.90 and 209,135

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Solution

The fourth proportional to 378,904.52, 522,884.90 and 209,135 is: 288,604.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,904.52 : 522,884.90 = 209,135 : x
  2. Step 2: Convert to fraction form
    378,904.52/522,884.90 = 209,135/x
  3. Step 3: Cross multiply
    378,904.52x = 522,884.90 × 209,135
  4. Step 4: Simplify right side
    378,904.52x = 109,353,533,561.50
  5. Step 5: Solve for x
    x = 109,353,533,561.50/378,904.52
  6. Step 6: Final answer
    x = 288,604.46

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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.