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Finding the Fourth Proportional to 421,220.40, 632,003.40 and 155,108.40

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Solution

The fourth proportional to 421,220.40, 632,003.40 and 155,108.40 is: 232,726.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,220.40 : 632,003.40 = 155,108.40 : x
  2. Step 2: Convert to fraction form
    421,220.40/632,003.40 = 155,108.40/x
  3. Step 3: Cross multiply
    421,220.40x = 632,003.40 × 155,108.40
  4. Step 4: Simplify right side
    421,220.40x = 98,029,036,168.56
  5. Step 5: Solve for x
    x = 98,029,036,168.56/421,220.40
  6. Step 6: Final answer
    x = 232,726.23

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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.