Home / 686,108.08-946,815.01-380,181.78

Finding the Fourth Proportional to 686,108.08, 946,815.01 and 380,181.78

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Solution

The fourth proportional to 686,108.08, 946,815.01 and 380,181.78 is: 524,643.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,108.08 : 946,815.01 = 380,181.78 : x
  2. Step 2: Convert to fraction form
    686,108.08/946,815.01 = 380,181.78/x
  3. Step 3: Cross multiply
    686,108.08x = 946,815.01 × 380,181.78
  4. Step 4: Simplify right side
    686,108.08x = 359,961,814,882.06
  5. Step 5: Solve for x
    x = 359,961,814,882.06/686,108.08
  6. Step 6: Final answer
    x = 524,643.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.