Home / 728,511,140.46-1,005,348,382.06-393,983,655.62

Finding the Fourth Proportional to 728,511,140.46, 1,005,348,382.06 and 393,983,655.62

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Solution

The fourth proportional to 728,511,140.46, 1,005,348,382.06 and 393,983,655.62 is: 543,699,071.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,511,140.46 : 1,005,348,382.06 = 393,983,655.62 : x
  2. Step 2: Convert to fraction form
    728,511,140.46/1,005,348,382.06 = 393,983,655.62/x
  3. Step 3: Cross multiply
    728,511,140.46x = 1,005,348,382.06 × 393,983,655.62
  4. Step 4: Simplify right side
    728,511,140.46x = 396,090,830,735,651,200
  5. Step 5: Solve for x
    x = 396,090,830,735,651,200/728,511,140.46
  6. Step 6: Final answer
    x = 543,699,071.62

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Double scale
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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.