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Finding the Fourth Proportional to 878,859.60, 1,317,697.56 and 317,821.20

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Solution

The fourth proportional to 878,859.60, 1,317,697.56 and 317,821.20 is: 476,517.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,859.60 : 1,317,697.56 = 317,821.20 : x
  2. Step 2: Convert to fraction form
    878,859.60/1,317,697.56 = 317,821.20/x
  3. Step 3: Cross multiply
    878,859.60x = 1,317,697.56 × 317,821.20
  4. Step 4: Simplify right side
    878,859.60x = 418,792,219,756.27
  5. Step 5: Solve for x
    x = 418,792,219,756.27/878,859.60
  6. Step 6: Final answer
    x = 476,517.77

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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.