Home / 385,815.36-578,256.48-198,724.80

Finding the Fourth Proportional to 385,815.36, 578,256.48 and 198,724.80

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Solution

The fourth proportional to 385,815.36, 578,256.48 and 198,724.80 is: 297,846.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,815.36 : 578,256.48 = 198,724.80 : x
  2. Step 2: Convert to fraction form
    385,815.36/578,256.48 = 198,724.80/x
  3. Step 3: Cross multiply
    385,815.36x = 578,256.48 × 198,724.80
  4. Step 4: Simplify right side
    385,815.36x = 114,913,903,336.70
  5. Step 5: Solve for x
    x = 114,913,903,336.70/385,815.36
  6. Step 6: Final answer
    x = 297,846.89

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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.