Home / 579,965.81-869,511.11-380,336.45

Finding the Fourth Proportional to 579,965.81, 869,511.11 and 380,336.45

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Solution

The fourth proportional to 579,965.81, 869,511.11 and 380,336.45 is: 570,217.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,965.81 : 869,511.11 = 380,336.45 : x
  2. Step 2: Convert to fraction form
    579,965.81/869,511.11 = 380,336.45/x
  3. Step 3: Cross multiply
    579,965.81x = 869,511.11 × 380,336.45
  4. Step 4: Simplify right side
    579,965.81x = 330,706,762,563.72
  5. Step 5: Solve for x
    x = 330,706,762,563.72/579,965.81
  6. Step 6: Final answer
    x = 570,217.69

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Double scale
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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.