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Finding the Fourth Proportional to 303,430.90, 455,207.10 and 90,198.40

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Solution

The fourth proportional to 303,430.90, 455,207.10 and 90,198.40 is: 135,315.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,430.90 : 455,207.10 = 90,198.40 : x
  2. Step 2: Convert to fraction form
    303,430.90/455,207.10 = 90,198.40/x
  3. Step 3: Cross multiply
    303,430.90x = 455,207.10 × 90,198.40
  4. Step 4: Simplify right side
    303,430.90x = 41,058,952,088.64
  5. Step 5: Solve for x
    x = 41,058,952,088.64/303,430.90
  6. Step 6: Final answer
    x = 135,315.66

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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.