Home / 385,120.80-577,681.20-259,149.60

Finding the Fourth Proportional to 385,120.80, 577,681.20 and 259,149.60

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Solution

The fourth proportional to 385,120.80, 577,681.20 and 259,149.60 is: 388,724.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,120.80 : 577,681.20 = 259,149.60 : x
  2. Step 2: Convert to fraction form
    385,120.80/577,681.20 = 259,149.60/x
  3. Step 3: Cross multiply
    385,120.80x = 577,681.20 × 259,149.60
  4. Step 4: Simplify right side
    385,120.80x = 149,705,851,907.52
  5. Step 5: Solve for x
    x = 149,705,851,907.52/385,120.80
  6. Step 6: Final answer
    x = 388,724.40

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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.