Home / 860,830.20-1,291,195.49-328,405.05

Finding the Fourth Proportional to 860,830.20, 1,291,195.49 and 328,405.05

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Solution

The fourth proportional to 860,830.20, 1,291,195.49 and 328,405.05 is: 492,588.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    860,830.20 : 1,291,195.49 = 328,405.05 : x
  2. Step 2: Convert to fraction form
    860,830.20/1,291,195.49 = 328,405.05/x
  3. Step 3: Cross multiply
    860,830.20x = 1,291,195.49 × 328,405.05
  4. Step 4: Simplify right side
    860,830.20x = 424,035,117,811.20
  5. Step 5: Solve for x
    x = 424,035,117,811.20/860,830.20
  6. Step 6: Final answer
    x = 492,588.57

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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.