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Finding the Fourth Proportional to 355,590.10, 490,674.06 and 210,400.30

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Solution

The fourth proportional to 355,590.10, 490,674.06 and 210,400.30 is: 290,328.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,590.10 : 490,674.06 = 210,400.30 : x
  2. Step 2: Convert to fraction form
    355,590.10/490,674.06 = 210,400.30/x
  3. Step 3: Cross multiply
    355,590.10x = 490,674.06 × 210,400.30
  4. Step 4: Simplify right side
    355,590.10x = 103,237,969,426.22
  5. Step 5: Solve for x
    x = 103,237,969,426.22/355,590.10
  6. Step 6: Final answer
    x = 290,328.58

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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.