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Finding the Fourth Proportional to 686,657.07, 947,576.97 and 380,734.05

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Solution

The fourth proportional to 686,657.07, 947,576.97 and 380,734.05 is: 525,407.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,657.07 : 947,576.97 = 380,734.05 : x
  2. Step 2: Convert to fraction form
    686,657.07/947,576.97 = 380,734.05/x
  3. Step 3: Cross multiply
    686,657.07x = 947,576.97 × 380,734.05
  4. Step 4: Simplify right side
    686,657.07x = 360,774,817,474.83
  5. Step 5: Solve for x
    x = 360,774,817,474.83/686,657.07
  6. Step 6: Final answer
    x = 525,407.56

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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.