Home / 390,825.36-539,329.44-218,745.60

Finding the Fourth Proportional to 390,825.36, 539,329.44 and 218,745.60

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Solution

The fourth proportional to 390,825.36, 539,329.44 and 218,745.60 is: 301,863.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,825.36 : 539,329.44 = 218,745.60 : x
  2. Step 2: Convert to fraction form
    390,825.36/539,329.44 = 218,745.60/x
  3. Step 3: Cross multiply
    390,825.36x = 539,329.44 × 218,745.60
  4. Step 4: Simplify right side
    390,825.36x = 117,975,941,950.46
  5. Step 5: Solve for x
    x = 117,975,941,950.46/390,825.36
  6. Step 6: Final answer
    x = 301,863.58

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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.