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Finding the Fourth Proportional to 418,984.04, 628,477.34 and 103,440.98

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Solution

The fourth proportional to 418,984.04, 628,477.34 and 103,440.98 is: 155,161.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,984.04 : 628,477.34 = 103,440.98 : x
  2. Step 2: Convert to fraction form
    418,984.04/628,477.34 = 103,440.98/x
  3. Step 3: Cross multiply
    418,984.04x = 628,477.34 × 103,440.98
  4. Step 4: Simplify right side
    418,984.04x = 65,010,311,957.39
  5. Step 5: Solve for x
    x = 65,010,311,957.39/418,984.04
  6. Step 6: Final answer
    x = 155,161.79

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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.