Home / 579,518.40-868,111.20-390,561.60

Finding the Fourth Proportional to 579,518.40, 868,111.20 and 390,561.60

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Solution

The fourth proportional to 579,518.40, 868,111.20 and 390,561.60 is: 585,056.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,518.40 : 868,111.20 = 390,561.60 : x
  2. Step 2: Convert to fraction form
    579,518.40/868,111.20 = 390,561.60/x
  3. Step 3: Cross multiply
    579,518.40x = 868,111.20 × 390,561.60
  4. Step 4: Simplify right side
    579,518.40x = 339,050,899,249.92
  5. Step 5: Solve for x
    x = 339,050,899,249.92/579,518.40
  6. Step 6: Final answer
    x = 585,056.31

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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.