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Finding the Fourth Proportional to 313,090.79, 432,372.15 and 216,542.03

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Solution

The fourth proportional to 313,090.79, 432,372.15 and 216,542.03 is: 299,040.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,090.79 : 432,372.15 = 216,542.03 : x
  2. Step 2: Convert to fraction form
    313,090.79/432,372.15 = 216,542.03/x
  3. Step 3: Cross multiply
    313,090.79x = 432,372.15 × 216,542.03
  4. Step 4: Simplify right side
    313,090.79x = 93,626,740,914.60
  5. Step 5: Solve for x
    x = 93,626,740,914.60/313,090.79
  6. Step 6: Final answer
    x = 299,040.23

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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.