Home / 788,690.40-1,183,813.20-389,781.60

Finding the Fourth Proportional to 788,690.40, 1,183,813.20 and 389,781.60

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Solution

The fourth proportional to 788,690.40, 1,183,813.20 and 389,781.60 is: 585,056.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    788,690.40 : 1,183,813.20 = 389,781.60 : x
  2. Step 2: Convert to fraction form
    788,690.40/1,183,813.20 = 389,781.60/x
  3. Step 3: Cross multiply
    788,690.40x = 1,183,813.20 × 389,781.60
  4. Step 4: Simplify right side
    788,690.40x = 461,428,603,197.12
  5. Step 5: Solve for x
    x = 461,428,603,197.12/788,690.40
  6. Step 6: Final answer
    x = 585,056.70

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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.