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Finding the Fourth Proportional to 578,131.20, 866,678.40 and 515,145.60

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Solution

The fourth proportional to 578,131.20, 866,678.40 and 515,145.60 is: 772,256.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,131.20 : 866,678.40 = 515,145.60 : x
  2. Step 2: Convert to fraction form
    578,131.20/866,678.40 = 515,145.60/x
  3. Step 3: Cross multiply
    578,131.20x = 866,678.40 × 515,145.60
  4. Step 4: Simplify right side
    578,131.20x = 446,465,564,375.04
  5. Step 5: Solve for x
    x = 446,465,564,375.04/578,131.20
  6. Step 6: Final answer
    x = 772,256.48

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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.