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Finding the Fourth Proportional to 609,640.80, 914,461.20 and 397,064.40

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Solution

The fourth proportional to 609,640.80, 914,461.20 and 397,064.40 is: 595,596.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    609,640.80 : 914,461.20 = 397,064.40 : x
  2. Step 2: Convert to fraction form
    609,640.80/914,461.20 = 397,064.40/x
  3. Step 3: Cross multiply
    609,640.80x = 914,461.20 × 397,064.40
  4. Step 4: Simplify right side
    609,640.80x = 363,099,987,701.28
  5. Step 5: Solve for x
    x = 363,099,987,701.28/609,640.80
  6. Step 6: Final answer
    x = 595,596.60

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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.