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Finding the Fourth Proportional to 528,654.90, 729,370.07 and 299,189.40

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Solution

The fourth proportional to 528,654.90, 729,370.07 and 299,189.40 is: 412,783.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,654.90 : 729,370.07 = 299,189.40 : x
  2. Step 2: Convert to fraction form
    528,654.90/729,370.07 = 299,189.40/x
  3. Step 3: Cross multiply
    528,654.90x = 729,370.07 × 299,189.40
  4. Step 4: Simplify right side
    528,654.90x = 218,219,790,512.13
  5. Step 5: Solve for x
    x = 218,219,790,512.13/528,654.90
  6. Step 6: Final answer
    x = 412,783.06

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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.