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Finding the Fourth Proportional to 526,620.40, 788,618.40 and 421,644.40

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Solution

The fourth proportional to 526,620.40, 788,618.40 and 421,644.40 is: 631,415.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    526,620.40 : 788,618.40 = 421,644.40 : x
  2. Step 2: Convert to fraction form
    526,620.40/788,618.40 = 421,644.40/x
  3. Step 3: Cross multiply
    526,620.40x = 788,618.40 × 421,644.40
  4. Step 4: Simplify right side
    526,620.40x = 332,516,532,096.96
  5. Step 5: Solve for x
    x = 332,516,532,096.96/526,620.40
  6. Step 6: Final answer
    x = 631,415.97

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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.