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Finding the Fourth Proportional to 355,585.56, 490,667.77 and 210,395.80

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Solution

The fourth proportional to 355,585.56, 490,667.77 and 210,395.80 is: 290,322.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,585.56 : 490,667.77 = 210,395.80 : x
  2. Step 2: Convert to fraction form
    355,585.56/490,667.77 = 210,395.80/x
  3. Step 3: Cross multiply
    355,585.56x = 490,667.77 × 210,395.80
  4. Step 4: Simplify right side
    355,585.56x = 103,234,436,250.71
  5. Step 5: Solve for x
    x = 103,234,436,250.71/355,585.56
  6. Step 6: Final answer
    x = 290,322.35

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1.5x scale

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.