Home / 1,215,785,126.90-1,677,784,910-658,868,173.96

Finding the Fourth Proportional to 1,215,785,126.90, 1,677,784,910 and 658,868,173.96

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Solution

The fourth proportional to 1,215,785,126.90, 1,677,784,910 and 658,868,173.96 is: 909,238,857.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,215,785,126.90 : 1,677,784,910 = 658,868,173.96 : x
  2. Step 2: Convert to fraction form
    1,215,785,126.90/1,677,784,910 = 658,868,173.96/x
  3. Step 3: Cross multiply
    1,215,785,126.90x = 1,677,784,910 × 658,868,173.96
  4. Step 4: Simplify right side
    1,215,785,126.90x = 1,105,439,079,949,342,976
  5. Step 5: Solve for x
    x = 1,105,439,079,949,342,976/1,215,785,126.90
  6. Step 6: Final answer
    x = 909,238,857.67

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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.