Home / 788,986.80-1,183,480.20-389,689.20

Finding the Fourth Proportional to 788,986.80, 1,183,480.20 and 389,689.20

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Solution

The fourth proportional to 788,986.80, 1,183,480.20 and 389,689.20 is: 584,533.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    788,986.80 : 1,183,480.20 = 389,689.20 : x
  2. Step 2: Convert to fraction form
    788,986.80/1,183,480.20 = 389,689.20/x
  3. Step 3: Cross multiply
    788,986.80x = 1,183,480.20 × 389,689.20
  4. Step 4: Simplify right side
    788,986.80x = 461,189,452,353.84
  5. Step 5: Solve for x
    x = 461,189,452,353.84/788,986.80
  6. Step 6: Final answer
    x = 584,533.80

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Double scale
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Similar ratio
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1.5x scale

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.