Home / 716,478.19-988,739.85-394,181.37

Finding the Fourth Proportional to 716,478.19, 988,739.85 and 394,181.37

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Solution

The fourth proportional to 716,478.19, 988,739.85 and 394,181.37 is: 543,970.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,478.19 : 988,739.85 = 394,181.37 : x
  2. Step 2: Convert to fraction form
    716,478.19/988,739.85 = 394,181.37/x
  3. Step 3: Cross multiply
    716,478.19x = 988,739.85 × 394,181.37
  4. Step 4: Simplify right side
    716,478.19x = 389,742,828,646.60
  5. Step 5: Solve for x
    x = 389,742,828,646.60/716,478.19
  6. Step 6: Final answer
    x = 543,970.26

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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.