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Finding the Fourth Proportional to 628,914.84, 867,891.24 and 342,429.72

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Solution

The fourth proportional to 628,914.84, 867,891.24 and 342,429.72 is: 472,546.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,914.84 : 867,891.24 = 342,429.72 : x
  2. Step 2: Convert to fraction form
    628,914.84/867,891.24 = 342,429.72/x
  3. Step 3: Cross multiply
    628,914.84x = 867,891.24 × 342,429.72
  4. Step 4: Simplify right side
    628,914.84x = 297,191,754,303.65
  5. Step 5: Solve for x
    x = 297,191,754,303.65/628,914.84
  6. Step 6: Final answer
    x = 472,546.89

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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.