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Finding the Fourth Proportional to 438,010.80, 657,016.20 and 201,814.80

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Solution

The fourth proportional to 438,010.80, 657,016.20 and 201,814.80 is: 302,722.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,010.80 : 657,016.20 = 201,814.80 : x
  2. Step 2: Convert to fraction form
    438,010.80/657,016.20 = 201,814.80/x
  3. Step 3: Cross multiply
    438,010.80x = 657,016.20 × 201,814.80
  4. Step 4: Simplify right side
    438,010.80x = 132,595,592,999.76
  5. Step 5: Solve for x
    x = 132,595,592,999.76/438,010.80
  6. Step 6: Final answer
    x = 302,722.20

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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.