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Finding the Fourth Proportional to 811,405.60, 1,214,775.60 and 727,424.80

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Solution

The fourth proportional to 811,405.60, 1,214,775.60 and 727,424.80 is: 1,089,045.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,405.60 : 1,214,775.60 = 727,424.80 : x
  2. Step 2: Convert to fraction form
    811,405.60/1,214,775.60 = 727,424.80/x
  3. Step 3: Cross multiply
    811,405.60x = 1,214,775.60 × 727,424.80
  4. Step 4: Simplify right side
    811,405.60x = 883,657,897,874.88
  5. Step 5: Solve for x
    x = 883,657,897,874.88/811,405.60
  6. Step 6: Final answer
    x = 1,089,045.85

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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.