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Finding the Fourth Proportional to 354,635.60, 530,657.40 and 261,323.60

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Solution

The fourth proportional to 354,635.60, 530,657.40 and 261,323.60 is: 391,030.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,635.60 : 530,657.40 = 261,323.60 : x
  2. Step 2: Convert to fraction form
    354,635.60/530,657.40 = 261,323.60/x
  3. Step 3: Cross multiply
    354,635.60x = 530,657.40 × 261,323.60
  4. Step 4: Simplify right side
    354,635.60x = 138,673,302,134.64
  5. Step 5: Solve for x
    x = 138,673,302,134.64/354,635.60
  6. Step 6: Final answer
    x = 391,030.40

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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.