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Finding the Fourth Proportional to 355,567.82, 490,643.40 and 210,378.06

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Solution

The fourth proportional to 355,567.82, 490,643.40 and 210,378.06 is: 290,297.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,567.82 : 490,643.40 = 210,378.06 : x
  2. Step 2: Convert to fraction form
    355,567.82/490,643.40 = 210,378.06/x
  3. Step 3: Cross multiply
    355,567.82x = 490,643.40 × 210,378.06
  4. Step 4: Simplify right side
    355,567.82x = 103,220,606,643.80
  5. Step 5: Solve for x
    x = 103,220,606,643.80/355,567.82
  6. Step 6: Final answer
    x = 290,297.94

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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.