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Finding the Fourth Proportional to 353,653.60, 530,480.40 and 143,298.40

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Solution

The fourth proportional to 353,653.60, 530,480.40 and 143,298.40 is: 214,947.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,653.60 : 530,480.40 = 143,298.40 : x
  2. Step 2: Convert to fraction form
    353,653.60/530,480.40 = 143,298.40/x
  3. Step 3: Cross multiply
    353,653.60x = 530,480.40 × 143,298.40
  4. Step 4: Simplify right side
    353,653.60x = 76,016,992,551.36
  5. Step 5: Solve for x
    x = 76,016,992,551.36/353,653.60
  6. Step 6: Final answer
    x = 214,947.60

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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.