Home / 1,398,768,121.85-1,931,171,153.52-890,417,664.91

Finding the Fourth Proportional to 1,398,768,121.85, 1,931,171,153.52 and 890,417,664.91

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Solution

The fourth proportional to 1,398,768,121.85, 1,931,171,153.52 and 890,417,664.91 is: 1,229,330,924.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,398,768,121.85 : 1,931,171,153.52 = 890,417,664.91 : x
  2. Step 2: Convert to fraction form
    1,398,768,121.85/1,931,171,153.52 = 890,417,664.91/x
  3. Step 3: Cross multiply
    1,398,768,121.85x = 1,931,171,153.52 × 890,417,664.91
  4. Step 4: Simplify right side
    1,398,768,121.85x = 1,719,548,909,058,829,568
  5. Step 5: Solve for x
    x = 1,719,548,909,058,829,568/1,398,768,121.85
  6. Step 6: Final answer
    x = 1,229,330,924.97

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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.