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Finding the Fourth Proportional to 980,337.60, 1,470,506.40 and 419,428.80

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Solution

The fourth proportional to 980,337.60, 1,470,506.40 and 419,428.80 is: 629,143.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    980,337.60 : 1,470,506.40 = 419,428.80 : x
  2. Step 2: Convert to fraction form
    980,337.60/1,470,506.40 = 419,428.80/x
  3. Step 3: Cross multiply
    980,337.60x = 1,470,506.40 × 419,428.80
  4. Step 4: Simplify right side
    980,337.60x = 616,772,734,744.32
  5. Step 5: Solve for x
    x = 616,772,734,744.32/980,337.60
  6. Step 6: Final answer
    x = 629,143.20

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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.