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Finding the Fourth Proportional to 647,693.40, 971,540.10 and 423,307.20

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Solution

The fourth proportional to 647,693.40, 971,540.10 and 423,307.20 is: 634,960.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,693.40 : 971,540.10 = 423,307.20 : x
  2. Step 2: Convert to fraction form
    647,693.40/971,540.10 = 423,307.20/x
  3. Step 3: Cross multiply
    647,693.40x = 971,540.10 × 423,307.20
  4. Step 4: Simplify right side
    647,693.40x = 411,259,919,418.72
  5. Step 5: Solve for x
    x = 411,259,919,418.72/647,693.40
  6. Step 6: Final answer
    x = 634,960.80

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Similar ratio
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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.