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Finding the Fourth Proportional to 353,620.40, 530,430.60 and 347,788.40

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Solution

The fourth proportional to 353,620.40, 530,430.60 and 347,788.40 is: 521,682.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,620.40 : 530,430.60 = 347,788.40 : x
  2. Step 2: Convert to fraction form
    353,620.40/530,430.60 = 347,788.40/x
  3. Step 3: Cross multiply
    353,620.40x = 530,430.60 × 347,788.40
  4. Step 4: Simplify right side
    353,620.40x = 184,477,609,685.04
  5. Step 5: Solve for x
    x = 184,477,609,685.04/353,620.40
  6. Step 6: Final answer
    x = 521,682.60

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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.