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Finding the Fourth Proportional to 355,569.51, 490,645.74 and 210,379.74

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Solution

The fourth proportional to 355,569.51, 490,645.74 and 210,379.74 is: 290,300.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,569.51 : 490,645.74 = 210,379.74 : x
  2. Step 2: Convert to fraction form
    355,569.51/490,645.74 = 210,379.74/x
  3. Step 3: Cross multiply
    355,569.51x = 490,645.74 × 210,379.74
  4. Step 4: Simplify right side
    355,569.51x = 103,221,922,161.41
  5. Step 5: Solve for x
    x = 103,221,922,161.41/355,569.51
  6. Step 6: Final answer
    x = 290,300.26

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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.