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Finding the Fourth Proportional to 455,398.12, 628,457.70 and 254,189.80

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Solution

The fourth proportional to 455,398.12, 628,457.70 and 254,189.80 is: 350,786.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,398.12 : 628,457.70 = 254,189.80 : x
  2. Step 2: Convert to fraction form
    455,398.12/628,457.70 = 254,189.80/x
  3. Step 3: Cross multiply
    455,398.12x = 628,457.70 × 254,189.80
  4. Step 4: Simplify right side
    455,398.12x = 159,747,537,071.46
  5. Step 5: Solve for x
    x = 159,747,537,071.46/455,398.12
  6. Step 6: Final answer
    x = 350,786.55

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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.