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Finding the Fourth Proportional to 647,454.80, 971,182.20 and 643,307.60

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Solution

The fourth proportional to 647,454.80, 971,182.20 and 643,307.60 is: 964,961.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,454.80 : 971,182.20 = 643,307.60 : x
  2. Step 2: Convert to fraction form
    647,454.80/971,182.20 = 643,307.60/x
  3. Step 3: Cross multiply
    647,454.80x = 971,182.20 × 643,307.60
  4. Step 4: Simplify right side
    647,454.80x = 624,768,890,244.72
  5. Step 5: Solve for x
    x = 624,768,890,244.72/647,454.80
  6. Step 6: Final answer
    x = 964,961.40

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Similar ratio
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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.