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Finding the Fourth Proportional to 921,378,549.90, 1,264,734,245.72 and 814,617,957.90

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Solution

The fourth proportional to 921,378,549.90, 1,264,734,245.72 and 814,617,957.90 is: 1,118,188,858.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    921,378,549.90 : 1,264,734,245.72 = 814,617,957.90 : x
  2. Step 2: Convert to fraction form
    921,378,549.90/1,264,734,245.72 = 814,617,957.90/x
  3. Step 3: Cross multiply
    921,378,549.90x = 1,264,734,245.72 × 814,617,957.90
  4. Step 4: Simplify right side
    921,378,549.90x = 1,030,275,228,530,550,016
  5. Step 5: Solve for x
    x = 1,030,275,228,530,550,016/921,378,549.90
  6. Step 6: Final answer
    x = 1,118,188,858.03

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.