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Finding the Fourth Proportional to 628,666.90, 867,679.95 and 356,760.07

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Solution

The fourth proportional to 628,666.90, 867,679.95 and 356,760.07 is: 492,396.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,666.90 : 867,679.95 = 356,760.07 : x
  2. Step 2: Convert to fraction form
    628,666.90/867,679.95 = 356,760.07/x
  3. Step 3: Cross multiply
    628,666.90x = 867,679.95 × 356,760.07
  4. Step 4: Simplify right side
    628,666.90x = 309,553,559,699.60
  5. Step 5: Solve for x
    x = 309,553,559,699.60/628,666.90
  6. Step 6: Final answer
    x = 492,396.78

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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.