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Finding the Fourth Proportional to 876,668.40, 1,315,002.60 and 343,915.20

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Solution

The fourth proportional to 876,668.40, 1,315,002.60 and 343,915.20 is: 515,872.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    876,668.40 : 1,315,002.60 = 343,915.20 : x
  2. Step 2: Convert to fraction form
    876,668.40/1,315,002.60 = 343,915.20/x
  3. Step 3: Cross multiply
    876,668.40x = 1,315,002.60 × 343,915.20
  4. Step 4: Simplify right side
    876,668.40x = 452,249,382,179.52
  5. Step 5: Solve for x
    x = 452,249,382,179.52/876,668.40
  6. Step 6: Final answer
    x = 515,872.80

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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.