Home / 686,736.83-947,679.35-380,808.34

Finding the Fourth Proportional to 686,736.83, 947,679.35 and 380,808.34

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Solution

The fourth proportional to 686,736.83, 947,679.35 and 380,808.34 is: 525,505.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,736.83 : 947,679.35 = 380,808.34 : x
  2. Step 2: Convert to fraction form
    686,736.83/947,679.35 = 380,808.34/x
  3. Step 3: Cross multiply
    686,736.83x = 947,679.35 × 380,808.34
  4. Step 4: Simplify right side
    686,736.83x = 360,884,195,852.54
  5. Step 5: Solve for x
    x = 360,884,195,852.54/686,736.83
  6. Step 6: Final answer
    x = 525,505.81

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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.