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Finding the Fourth Proportional to 712,059.72, 982,643.86 and 389,790.40

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Solution

The fourth proportional to 712,059.72, 982,643.86 and 389,790.40 is: 537,911.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,059.72 : 982,643.86 = 389,790.40 : x
  2. Step 2: Convert to fraction form
    712,059.72/982,643.86 = 389,790.40/x
  3. Step 3: Cross multiply
    712,059.72x = 982,643.86 × 389,790.40
  4. Step 4: Simplify right side
    712,059.72x = 383,025,143,246.94
  5. Step 5: Solve for x
    x = 383,025,143,246.94/712,059.72
  6. Step 6: Final answer
    x = 537,911.54

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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.