Home / 665,918.32-918,742.41-379,235.42

Finding the Fourth Proportional to 665,918.32, 918,742.41 and 379,235.42

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Solution

The fourth proportional to 665,918.32, 918,742.41 and 379,235.42 is: 523,216.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,918.32 : 918,742.41 = 379,235.42 : x
  2. Step 2: Convert to fraction form
    665,918.32/918,742.41 = 379,235.42/x
  3. Step 3: Cross multiply
    665,918.32x = 918,742.41 × 379,235.42
  4. Step 4: Simplify right side
    665,918.32x = 348,419,666,973.11
  5. Step 5: Solve for x
    x = 348,419,666,973.11/665,918.32
  6. Step 6: Final answer
    x = 523,216.82

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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.