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Finding the Fourth Proportional to 402,470.60, 603,705.90 and 215,846.60

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Solution

The fourth proportional to 402,470.60, 603,705.90 and 215,846.60 is: 323,769.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,470.60 : 603,705.90 = 215,846.60 : x
  2. Step 2: Convert to fraction form
    402,470.60/603,705.90 = 215,846.60/x
  3. Step 3: Cross multiply
    402,470.60x = 603,705.90 × 215,846.60
  4. Step 4: Simplify right side
    402,470.60x = 130,307,865,914.94
  5. Step 5: Solve for x
    x = 130,307,865,914.94/402,470.60
  6. Step 6: Final answer
    x = 323,769.90

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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.