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Finding the Fourth Proportional to 641,995.56, 885,981.72 and 355,515.64

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Solution

The fourth proportional to 641,995.56, 885,981.72 and 355,515.64 is: 490,627.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,995.56 : 885,981.72 = 355,515.64 : x
  2. Step 2: Convert to fraction form
    641,995.56/885,981.72 = 355,515.64/x
  3. Step 3: Cross multiply
    641,995.56x = 885,981.72 × 355,515.64
  4. Step 4: Simplify right side
    641,995.56x = 314,980,362,562.00
  5. Step 5: Solve for x
    x = 314,980,362,562.00/641,995.56
  6. Step 6: Final answer
    x = 490,627.01

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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.