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Finding the Fourth Proportional to 628,470.16, 867,308.42 and 356,549.51

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Solution

The fourth proportional to 628,470.16, 867,308.42 and 356,549.51 is: 492,049.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,470.16 : 867,308.42 = 356,549.51 : x
  2. Step 2: Convert to fraction form
    628,470.16/867,308.42 = 356,549.51/x
  3. Step 3: Cross multiply
    628,470.16x = 867,308.42 × 356,549.51
  4. Step 4: Simplify right side
    628,470.16x = 309,238,395,229.52
  5. Step 5: Solve for x
    x = 309,238,395,229.52/628,470.16
  6. Step 6: Final answer
    x = 492,049.45

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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.