Home / 431,918.18-648,439.81-290,397.41

Finding the Fourth Proportional to 431,918.18, 648,439.81 and 290,397.41

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Solution

The fourth proportional to 431,918.18, 648,439.81 and 290,397.41 is: 435,974.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,918.18 : 648,439.81 = 290,397.41 : x
  2. Step 2: Convert to fraction form
    431,918.18/648,439.81 = 290,397.41/x
  3. Step 3: Cross multiply
    431,918.18x = 648,439.81 × 290,397.41
  4. Step 4: Simplify right side
    431,918.18x = 188,305,241,364.89
  5. Step 5: Solve for x
    x = 188,305,241,364.89/431,918.18
  6. Step 6: Final answer
    x = 435,974.34

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.