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Finding the Fourth Proportional to 993,376.80, 1,490,680.80 and 520,401.60

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Solution

The fourth proportional to 993,376.80, 1,490,680.80 and 520,401.60 is: 780,924.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    993,376.80 : 1,490,680.80 = 520,401.60 : x
  2. Step 2: Convert to fraction form
    993,376.80/1,490,680.80 = 520,401.60/x
  3. Step 3: Cross multiply
    993,376.80x = 1,490,680.80 × 520,401.60
  4. Step 4: Simplify right side
    993,376.80x = 775,752,673,409.28
  5. Step 5: Solve for x
    x = 775,752,673,409.28/993,376.80
  6. Step 6: Final answer
    x = 780,924.90

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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.