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Finding the Fourth Proportional to 977,672.80, 1,465,634.40 and 640,874.80

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Solution

The fourth proportional to 977,672.80, 1,465,634.40 and 640,874.80 is: 960,738.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    977,672.80 : 1,465,634.40 = 640,874.80 : x
  2. Step 2: Convert to fraction form
    977,672.80/1,465,634.40 = 640,874.80/x
  3. Step 3: Cross multiply
    977,672.80x = 1,465,634.40 × 640,874.80
  4. Step 4: Simplify right side
    977,672.80x = 939,288,152,973.12
  5. Step 5: Solve for x
    x = 939,288,152,973.12/977,672.80
  6. Step 6: Final answer
    x = 960,738.76

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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.