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Finding the Fourth Proportional to 647,562.30, 971,343.45 and 643,415.10

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Solution

The fourth proportional to 647,562.30, 971,343.45 and 643,415.10 is: 965,122.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,562.30 : 971,343.45 = 643,415.10 : x
  2. Step 2: Convert to fraction form
    647,562.30/971,343.45 = 643,415.10/x
  3. Step 3: Cross multiply
    647,562.30x = 971,343.45 × 643,415.10
  4. Step 4: Simplify right side
    647,562.30x = 624,977,043,016.10
  5. Step 5: Solve for x
    x = 624,977,043,016.10/647,562.30
  6. Step 6: Final answer
    x = 965,122.65

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Double scale
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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.