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Finding the Fourth Proportional to 440,602.90, 660,918.72 and 209,741.80

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Solution

The fourth proportional to 440,602.90, 660,918.72 and 209,741.80 is: 314,619.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    440,602.90 : 660,918.72 = 209,741.80 : x
  2. Step 2: Convert to fraction form
    440,602.90/660,918.72 = 209,741.80/x
  3. Step 3: Cross multiply
    440,602.90x = 660,918.72 × 209,741.80
  4. Step 4: Simplify right side
    440,602.90x = 138,622,281,986.50
  5. Step 5: Solve for x
    x = 138,622,281,986.50/440,602.90
  6. Step 6: Final answer
    x = 314,619.54

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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.