Home / 389,712.40-537,749.16-217,609.36

Finding the Fourth Proportional to 389,712.40, 537,749.16 and 217,609.36

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Solution

The fourth proportional to 389,712.40, 537,749.16 and 217,609.36 is: 300,270.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,712.40 : 537,749.16 = 217,609.36 : x
  2. Step 2: Convert to fraction form
    389,712.40/537,749.16 = 217,609.36/x
  3. Step 3: Cross multiply
    389,712.40x = 537,749.16 × 217,609.36
  4. Step 4: Simplify right side
    389,712.40x = 117,019,250,548.14
  5. Step 5: Solve for x
    x = 117,019,250,548.14/389,712.40
  6. Step 6: Final answer
    x = 300,270.79

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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.