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Finding the Fourth Proportional to 417,859.20, 626,792.40 and 118,346.40

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Solution

The fourth proportional to 417,859.20, 626,792.40 and 118,346.40 is: 177,520.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    417,859.20 : 626,792.40 = 118,346.40 : x
  2. Step 2: Convert to fraction form
    417,859.20/626,792.40 = 118,346.40/x
  3. Step 3: Cross multiply
    417,859.20x = 626,792.40 × 118,346.40
  4. Step 4: Simplify right side
    417,859.20x = 74,178,624,087.36
  5. Step 5: Solve for x
    x = 74,178,624,087.36/417,859.20
  6. Step 6: Final answer
    x = 177,520.62

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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.