Home / 642,027.96-885,987.59-355,541.90

Finding the Fourth Proportional to 642,027.96, 885,987.59 and 355,541.90

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Solution

The fourth proportional to 642,027.96, 885,987.59 and 355,541.90 is: 490,641.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,027.96 : 885,987.59 = 355,541.90 : x
  2. Step 2: Convert to fraction form
    642,027.96/885,987.59 = 355,541.90/x
  3. Step 3: Cross multiply
    642,027.96x = 885,987.59 × 355,541.90
  4. Step 4: Simplify right side
    642,027.96x = 315,005,704,917.37
  5. Step 5: Solve for x
    x = 315,005,704,917.37/642,027.96
  6. Step 6: Final answer
    x = 490,641.72

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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.