Home / 378,890.16-522,831.20-209,113.35

Finding the Fourth Proportional to 378,890.16, 522,831.20 and 209,113.35

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Solution

The fourth proportional to 378,890.16, 522,831.20 and 209,113.35 is: 288,555.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,890.16 : 522,831.20 = 209,113.35 : x
  2. Step 2: Convert to fraction form
    378,890.16/522,831.20 = 209,113.35/x
  3. Step 3: Cross multiply
    378,890.16x = 522,831.20 × 209,113.35
  4. Step 4: Simplify right side
    378,890.16x = 109,330,982,670.95
  5. Step 5: Solve for x
    x = 109,330,982,670.95/378,890.16
  6. Step 6: Final answer
    x = 288,555.88

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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.