Home / 1,386,568,708.61-1,912,349,099.34-1,218,946,571.10

Finding the Fourth Proportional to 1,386,568,708.61, 1,912,349,099.34 and 1,218,946,571.10

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Solution

The fourth proportional to 1,386,568,708.61, 1,912,349,099.34 and 1,218,946,571.10 is: 1,681,165,428.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,386,568,708.61 : 1,912,349,099.34 = 1,218,946,571.10 : x
  2. Step 2: Convert to fraction form
    1,386,568,708.61/1,912,349,099.34 = 1,218,946,571.10/x
  3. Step 3: Cross multiply
    1,386,568,708.61x = 1,912,349,099.34 × 1,218,946,571.10
  4. Step 4: Simplify right side
    1,386,568,708.61x = 2,331,051,377,386,665,984
  5. Step 5: Solve for x
    x = 2,331,051,377,386,665,984/1,386,568,708.61
  6. Step 6: Final answer
    x = 1,681,165,428.67

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Double scale
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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.