Home / 321,290.78-443,430.13-205,054.40

Finding the Fourth Proportional to 321,290.78, 443,430.13 and 205,054.40

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Solution

The fourth proportional to 321,290.78, 443,430.13 and 205,054.40 is: 283,006.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,290.78 : 443,430.13 = 205,054.40 : x
  2. Step 2: Convert to fraction form
    321,290.78/443,430.13 = 205,054.40/x
  3. Step 3: Cross multiply
    321,290.78x = 443,430.13 × 205,054.40
  4. Step 4: Simplify right side
    321,290.78x = 90,927,299,845.01
  5. Step 5: Solve for x
    x = 90,927,299,845.01/321,290.78
  6. Step 6: Final answer
    x = 283,006.25

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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.