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Finding the Fourth Proportional to 911,880.65, 1,258,551.55 and 530,128.86

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Solution

The fourth proportional to 911,880.65, 1,258,551.55 and 530,128.86 is: 731,668.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,880.65 : 1,258,551.55 = 530,128.86 : x
  2. Step 2: Convert to fraction form
    911,880.65/1,258,551.55 = 530,128.86/x
  3. Step 3: Cross multiply
    911,880.65x = 1,258,551.55 × 530,128.86
  4. Step 4: Simplify right side
    911,880.65x = 667,194,498,452.73
  5. Step 5: Solve for x
    x = 667,194,498,452.73/911,880.65
  6. Step 6: Final answer
    x = 731,668.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.