Home / 386,442.99-579,831.35-209,074.86

Finding the Fourth Proportional to 386,442.99, 579,831.35 and 209,074.86

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Solution

The fourth proportional to 386,442.99, 579,831.35 and 209,074.86 is: 313,702.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,442.99 : 579,831.35 = 209,074.86 : x
  2. Step 2: Convert to fraction form
    386,442.99/579,831.35 = 209,074.86/x
  3. Step 3: Cross multiply
    386,442.99x = 579,831.35 × 209,074.86
  4. Step 4: Simplify right side
    386,442.99x = 121,228,157,279.49
  5. Step 5: Solve for x
    x = 121,228,157,279.49/386,442.99
  6. Step 6: Final answer
    x = 313,702.57

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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.