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Finding the Fourth Proportional to 647,615.80, 971,423.70 and 253,631.80

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Solution

The fourth proportional to 647,615.80, 971,423.70 and 253,631.80 is: 380,447.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,615.80 : 971,423.70 = 253,631.80 : x
  2. Step 2: Convert to fraction form
    647,615.80/971,423.70 = 253,631.80/x
  3. Step 3: Cross multiply
    647,615.80x = 971,423.70 × 253,631.80
  4. Step 4: Simplify right side
    647,615.80x = 246,383,941,593.66
  5. Step 5: Solve for x
    x = 246,383,941,593.66/647,615.80
  6. Step 6: Final answer
    x = 380,447.70

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1.5x scale

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.