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Finding the Fourth Proportional to 385,300.80, 577,951.20 and 259,329.60

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Solution

The fourth proportional to 385,300.80, 577,951.20 and 259,329.60 is: 388,994.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,300.80 : 577,951.20 = 259,329.60 : x
  2. Step 2: Convert to fraction form
    385,300.80/577,951.20 = 259,329.60/x
  3. Step 3: Cross multiply
    385,300.80x = 577,951.20 × 259,329.60
  4. Step 4: Simplify right side
    385,300.80x = 149,879,853,515.52
  5. Step 5: Solve for x
    x = 149,879,853,515.52/385,300.80
  6. Step 6: Final answer
    x = 388,994.40

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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.