Home / 579,560.40-868,174.20-390,603.60

Finding the Fourth Proportional to 579,560.40, 868,174.20 and 390,603.60

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Solution

The fourth proportional to 579,560.40, 868,174.20 and 390,603.60 is: 585,119.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,560.40 : 868,174.20 = 390,603.60 : x
  2. Step 2: Convert to fraction form
    579,560.40/868,174.20 = 390,603.60/x
  3. Step 3: Cross multiply
    579,560.40x = 868,174.20 × 390,603.60
  4. Step 4: Simplify right side
    579,560.40x = 339,111,967,947.12
  5. Step 5: Solve for x
    x = 339,111,967,947.12/579,560.40
  6. Step 6: Final answer
    x = 585,119.29

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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.