Home / 686,249.01-947,089.80-380,391.66

Finding the Fourth Proportional to 686,249.01, 947,089.80 and 380,391.66

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Solution

The fourth proportional to 686,249.01, 947,089.80 and 380,391.66 is: 524,977.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,249.01 : 947,089.80 = 380,391.66 : x
  2. Step 2: Convert to fraction form
    686,249.01/947,089.80 = 380,391.66/x
  3. Step 3: Cross multiply
    686,249.01x = 947,089.80 × 380,391.66
  4. Step 4: Simplify right side
    686,249.01x = 360,265,061,191.07
  5. Step 5: Solve for x
    x = 360,265,061,191.07/686,249.01
  6. Step 6: Final answer
    x = 524,977.17

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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.