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Finding the Fourth Proportional to 353,458.40, 530,187.60 and 213,490.40

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Solution

The fourth proportional to 353,458.40, 530,187.60 and 213,490.40 is: 320,235.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,458.40 : 530,187.60 = 213,490.40 : x
  2. Step 2: Convert to fraction form
    353,458.40/530,187.60 = 213,490.40/x
  3. Step 3: Cross multiply
    353,458.40x = 530,187.60 × 213,490.40
  4. Step 4: Simplify right side
    353,458.40x = 113,189,962,799.04
  5. Step 5: Solve for x
    x = 113,189,962,799.04/353,458.40
  6. Step 6: Final answer
    x = 320,235.60

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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.