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Finding the Fourth Proportional to 3,316,859.18, 4,975,316.66 and 920,890.62

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Solution

The fourth proportional to 3,316,859.18, 4,975,316.66 and 920,890.62 is: 1,381,343.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,316,859.18 : 4,975,316.66 = 920,890.62 : x
  2. Step 2: Convert to fraction form
    3,316,859.18/4,975,316.66 = 920,890.62/x
  3. Step 3: Cross multiply
    3,316,859.18x = 4,975,316.66 × 920,890.62
  4. Step 4: Simplify right side
    3,316,859.18x = 4,581,722,446,025.96
  5. Step 5: Solve for x
    x = 4,581,722,446,025.96/3,316,859.18
  6. Step 6: Final answer
    x = 1,381,343.67

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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.