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Finding the Fourth Proportional to 353,630.09, 530,439.93 and 87,390.60

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Solution

The fourth proportional to 353,630.09, 530,439.93 and 87,390.60 is: 131,084.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,630.09 : 530,439.93 = 87,390.60 : x
  2. Step 2: Convert to fraction form
    353,630.09/530,439.93 = 87,390.60/x
  3. Step 3: Cross multiply
    353,630.09x = 530,439.93 × 87,390.60
  4. Step 4: Simplify right side
    353,630.09x = 46,355,461,094.46
  5. Step 5: Solve for x
    x = 46,355,461,094.46/353,630.09
  6. Step 6: Final answer
    x = 131,084.61

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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.