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Finding the Fourth Proportional to 408,810.96, 613,315.17 and 128,328.21

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Solution

The fourth proportional to 408,810.96, 613,315.17 and 128,328.21 is: 192,523.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,810.96 : 613,315.17 = 128,328.21 : x
  2. Step 2: Convert to fraction form
    408,810.96/613,315.17 = 128,328.21/x
  3. Step 3: Cross multiply
    408,810.96x = 613,315.17 × 128,328.21
  4. Step 4: Simplify right side
    408,810.96x = 78,705,637,931.95
  5. Step 5: Solve for x
    x = 78,705,637,931.95/408,810.96
  6. Step 6: Final answer
    x = 192,523.31

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1.5x scale

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.