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Finding the Fourth Proportional to 804,580.90, 1,207,648.95 and 405,672.10

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Solution

The fourth proportional to 804,580.90, 1,207,648.95 and 405,672.10 is: 608,900.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    804,580.90 : 1,207,648.95 = 405,672.10 : x
  2. Step 2: Convert to fraction form
    804,580.90/1,207,648.95 = 405,672.10/x
  3. Step 3: Cross multiply
    804,580.90x = 1,207,648.95 × 405,672.10
  4. Step 4: Simplify right side
    804,580.90x = 489,909,485,609.30
  5. Step 5: Solve for x
    x = 489,909,485,609.30/804,580.90
  6. Step 6: Final answer
    x = 608,900.22

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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.