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Finding the Fourth Proportional to 876,073.31, 1,208,978.90 and 488,884.59

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Solution

The fourth proportional to 876,073.31, 1,208,978.90 and 488,884.59 is: 674,659.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    876,073.31 : 1,208,978.90 = 488,884.59 : x
  2. Step 2: Convert to fraction form
    876,073.31/1,208,978.90 = 488,884.59/x
  3. Step 3: Cross multiply
    876,073.31x = 1,208,978.90 × 488,884.59
  4. Step 4: Simplify right side
    876,073.31x = 591,051,151,400.73
  5. Step 5: Solve for x
    x = 591,051,151,400.73/876,073.31
  6. Step 6: Final answer
    x = 674,659.47

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1.5x scale

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.