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Finding the Fourth Proportional to 603,402,313.80, 905,103,470.70 and 215,662,960.20

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Solution

The fourth proportional to 603,402,313.80, 905,103,470.70 and 215,662,960.20 is: 323,494,440.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    603,402,313.80 : 905,103,470.70 = 215,662,960.20 : x
  2. Step 2: Convert to fraction form
    603,402,313.80/905,103,470.70 = 215,662,960.20/x
  3. Step 3: Cross multiply
    603,402,313.80x = 905,103,470.70 × 215,662,960.20
  4. Step 4: Simplify right side
    603,402,313.80x = 195,197,293,778,455,968
  5. Step 5: Solve for x
    x = 195,197,293,778,455,968/603,402,313.80
  6. Step 6: Final answer
    x = 323,494,440.30

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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.