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Finding the Fourth Proportional to 626,416.80, 940,143.60 and 289,975.20

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Solution

The fourth proportional to 626,416.80, 940,143.60 and 289,975.20 is: 435,202.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    626,416.80 : 940,143.60 = 289,975.20 : x
  2. Step 2: Convert to fraction form
    626,416.80/940,143.60 = 289,975.20/x
  3. Step 3: Cross multiply
    626,416.80x = 940,143.60 × 289,975.20
  4. Step 4: Simplify right side
    626,416.80x = 272,618,328,438.72
  5. Step 5: Solve for x
    x = 272,618,328,438.72/626,416.80
  6. Step 6: Final answer
    x = 435,202.77

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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.