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Finding the Fourth Proportional to 485,977.88, 670,420.86 and 316,150.04

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Solution

The fourth proportional to 485,977.88, 670,420.86 and 316,150.04 is: 436,138.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,977.88 : 670,420.86 = 316,150.04 : x
  2. Step 2: Convert to fraction form
    485,977.88/670,420.86 = 316,150.04/x
  3. Step 3: Cross multiply
    485,977.88x = 670,420.86 × 316,150.04
  4. Step 4: Simplify right side
    485,977.88x = 211,953,581,705.83
  5. Step 5: Solve for x
    x = 211,953,581,705.83/485,977.88
  6. Step 6: Final answer
    x = 436,138.33

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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.