Home / 383,143.07-528,656.54-221,988.30

Finding the Fourth Proportional to 383,143.07, 528,656.54 and 221,988.30

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Solution

The fourth proportional to 383,143.07, 528,656.54 and 221,988.30 is: 306,296.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,143.07 : 528,656.54 = 221,988.30 : x
  2. Step 2: Convert to fraction form
    383,143.07/528,656.54 = 221,988.30/x
  3. Step 3: Cross multiply
    383,143.07x = 528,656.54 × 221,988.30
  4. Step 4: Simplify right side
    383,143.07x = 117,355,565,488.54
  5. Step 5: Solve for x
    x = 117,355,565,488.54/383,143.07
  6. Step 6: Final answer
    x = 306,296.98

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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.