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Finding the Fourth Proportional to 807,830.40, 1,211,745.60 and 525,820.80

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Solution

The fourth proportional to 807,830.40, 1,211,745.60 and 525,820.80 is: 788,731.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    807,830.40 : 1,211,745.60 = 525,820.80 : x
  2. Step 2: Convert to fraction form
    807,830.40/1,211,745.60 = 525,820.80/x
  3. Step 3: Cross multiply
    807,830.40x = 1,211,745.60 × 525,820.80
  4. Step 4: Simplify right side
    807,830.40x = 637,161,040,788.48
  5. Step 5: Solve for x
    x = 637,161,040,788.48/807,830.40
  6. Step 6: Final answer
    x = 788,731.20

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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.