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Finding the Fourth Proportional to 355,535.60, 490,689.24 and 217,796.72

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Solution

The fourth proportional to 355,535.60, 490,689.24 and 217,796.72 is: 300,590.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,535.60 : 490,689.24 = 217,796.72 : x
  2. Step 2: Convert to fraction form
    355,535.60/490,689.24 = 217,796.72/x
  3. Step 3: Cross multiply
    355,535.60x = 490,689.24 × 217,796.72
  4. Step 4: Simplify right side
    355,535.60x = 106,870,507,011.29
  5. Step 5: Solve for x
    x = 106,870,507,011.29/355,535.60
  6. Step 6: Final answer
    x = 300,590.17

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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.