Home / 830,642,723.80-1,245,964,085.70-345,905,546.20

Finding the Fourth Proportional to 830,642,723.80, 1,245,964,085.70 and 345,905,546.20

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Solution

The fourth proportional to 830,642,723.80, 1,245,964,085.70 and 345,905,546.20 is: 518,858,319.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    830,642,723.80 : 1,245,964,085.70 = 345,905,546.20 : x
  2. Step 2: Convert to fraction form
    830,642,723.80/1,245,964,085.70 = 345,905,546.20/x
  3. Step 3: Cross multiply
    830,642,723.80x = 1,245,964,085.70 × 345,905,546.20
  4. Step 4: Simplify right side
    830,642,723.80x = 430,985,887,609,642,112
  5. Step 5: Solve for x
    x = 430,985,887,609,642,112/830,642,723.80
  6. Step 6: Final answer
    x = 518,858,319.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.