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Finding the Fourth Proportional to 353,454.40, 530,181.60 and 213,486.40

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Solution

The fourth proportional to 353,454.40, 530,181.60 and 213,486.40 is: 320,229.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,454.40 : 530,181.60 = 213,486.40 : x
  2. Step 2: Convert to fraction form
    353,454.40/530,181.60 = 213,486.40/x
  3. Step 3: Cross multiply
    353,454.40x = 530,181.60 × 213,486.40
  4. Step 4: Simplify right side
    353,454.40x = 113,186,561,130.24
  5. Step 5: Solve for x
    x = 113,186,561,130.24/353,454.40
  6. Step 6: Final answer
    x = 320,229.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.