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Finding the Fourth Proportional to 628,941.79, 867,912.57 and 357,004.74

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Solution

The fourth proportional to 628,941.79, 867,912.57 and 357,004.74 is: 492,651.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,941.79 : 867,912.57 = 357,004.74 : x
  2. Step 2: Convert to fraction form
    628,941.79/867,912.57 = 357,004.74/x
  3. Step 3: Cross multiply
    628,941.79x = 867,912.57 × 357,004.74
  4. Step 4: Simplify right side
    628,941.79x = 309,848,901,395.58
  5. Step 5: Solve for x
    x = 309,848,901,395.58/628,941.79
  6. Step 6: Final answer
    x = 492,651.16

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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.