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Finding the Fourth Proportional to 342,318.40, 513,526.20 and 105,636.40

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Solution

The fourth proportional to 342,318.40, 513,526.20 and 105,636.40 is: 158,469.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,318.40 : 513,526.20 = 105,636.40 : x
  2. Step 2: Convert to fraction form
    342,318.40/513,526.20 = 105,636.40/x
  3. Step 3: Cross multiply
    342,318.40x = 513,526.20 × 105,636.40
  4. Step 4: Simplify right side
    342,318.40x = 54,247,059,073.68
  5. Step 5: Solve for x
    x = 54,247,059,073.68/342,318.40
  6. Step 6: Final answer
    x = 158,469.60

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1.5x scale

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.