Home / 390,725.36-539,201.04-211,877.36

Finding the Fourth Proportional to 390,725.36, 539,201.04 and 211,877.36

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Solution

The fourth proportional to 390,725.36, 539,201.04 and 211,877.36 is: 292,390.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,725.36 : 539,201.04 = 211,877.36 : x
  2. Step 2: Convert to fraction form
    390,725.36/539,201.04 = 211,877.36/x
  3. Step 3: Cross multiply
    390,725.36x = 539,201.04 × 211,877.36
  4. Step 4: Simplify right side
    390,725.36x = 114,244,492,864.45
  5. Step 5: Solve for x
    x = 114,244,492,864.45/390,725.36
  6. Step 6: Final answer
    x = 292,390.78

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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.