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Finding the Fourth Proportional to 628,963.56, 867,943.10 and 357,026.52

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Solution

The fourth proportional to 628,963.56, 867,943.10 and 357,026.52 is: 492,681.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,963.56 : 867,943.10 = 357,026.52 : x
  2. Step 2: Convert to fraction form
    628,963.56/867,943.10 = 357,026.52/x
  3. Step 3: Cross multiply
    628,963.56x = 867,943.10 × 357,026.52
  4. Step 4: Simplify right side
    628,963.56x = 309,878,702,765.88
  5. Step 5: Solve for x
    x = 309,878,702,765.88/628,963.56
  6. Step 6: Final answer
    x = 492,681.49

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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.