Home / 385,619.40-578,429.10-198,995.40

Finding the Fourth Proportional to 385,619.40, 578,429.10 and 198,995.40

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Solution

The fourth proportional to 385,619.40, 578,429.10 and 198,995.40 is: 298,493.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,619.40 : 578,429.10 = 198,995.40 : x
  2. Step 2: Convert to fraction form
    385,619.40/578,429.10 = 198,995.40/x
  3. Step 3: Cross multiply
    385,619.40x = 578,429.10 × 198,995.40
  4. Step 4: Simplify right side
    385,619.40x = 115,104,730,126.14
  5. Step 5: Solve for x
    x = 115,104,730,126.14/385,619.40
  6. Step 6: Final answer
    x = 298,493.10

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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.