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Finding the Fourth Proportional to 628,937.40, 868,010.04 and 357,089.88

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Solution

The fourth proportional to 628,937.40, 868,010.04 and 357,089.88 is: 492,827.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,937.40 : 868,010.04 = 357,089.88 : x
  2. Step 2: Convert to fraction form
    628,937.40/868,010.04 = 357,089.88/x
  3. Step 3: Cross multiply
    628,937.40x = 868,010.04 × 357,089.88
  4. Step 4: Simplify right side
    628,937.40x = 309,957,601,022.40
  5. Step 5: Solve for x
    x = 309,957,601,022.40/628,937.40
  6. Step 6: Final answer
    x = 492,827.43

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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.