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Finding the Fourth Proportional to 628,470.51, 867,308.94 and 356,549.87

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Solution

The fourth proportional to 628,470.51, 867,308.94 and 356,549.87 is: 492,049.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,470.51 : 867,308.94 = 356,549.87 : x
  2. Step 2: Convert to fraction form
    628,470.51/867,308.94 = 356,549.87/x
  3. Step 3: Cross multiply
    628,470.51x = 867,308.94 × 356,549.87
  4. Step 4: Simplify right side
    628,470.51x = 309,238,885,470.29
  5. Step 5: Solve for x
    x = 309,238,885,470.29/628,470.51
  6. Step 6: Final answer
    x = 492,049.95

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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.