Home / 1,321,149,978.68-1,980,415,969.40-620,387,681.18

Finding the Fourth Proportional to 1,321,149,978.68, 1,980,415,969.40 and 620,387,681.18

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Solution

The fourth proportional to 1,321,149,978.68, 1,980,415,969.40 and 620,387,681.18 is: 929,966,840.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,321,149,978.68 : 1,980,415,969.40 = 620,387,681.18 : x
  2. Step 2: Convert to fraction form
    1,321,149,978.68/1,980,415,969.40 = 620,387,681.18/x
  3. Step 3: Cross multiply
    1,321,149,978.68x = 1,980,415,969.40 × 620,387,681.18
  4. Step 4: Simplify right side
    1,321,149,978.68x = 1,228,625,671,027,907,840
  5. Step 5: Solve for x
    x = 1,228,625,671,027,907,840/1,321,149,978.68
  6. Step 6: Final answer
    x = 929,966,840.14

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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.