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Finding the Fourth Proportional to 353,346.60, 529,674.30 and 142,703.40

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Solution

The fourth proportional to 353,346.60, 529,674.30 and 142,703.40 is: 213,915.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,346.60 : 529,674.30 = 142,703.40 : x
  2. Step 2: Convert to fraction form
    353,346.60/529,674.30 = 142,703.40/x
  3. Step 3: Cross multiply
    353,346.60x = 529,674.30 × 142,703.40
  4. Step 4: Simplify right side
    353,346.60x = 75,586,323,502.62
  5. Step 5: Solve for x
    x = 75,586,323,502.62/353,346.60
  6. Step 6: Final answer
    x = 213,915.53

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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.