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Finding the Fourth Proportional to 526,628.40, 788,630.40 and 421,652.40

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Solution

The fourth proportional to 526,628.40, 788,630.40 and 421,652.40 is: 631,427.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    526,628.40 : 788,630.40 = 421,652.40 : x
  2. Step 2: Convert to fraction form
    526,628.40/788,630.40 = 421,652.40/x
  3. Step 3: Cross multiply
    526,628.40x = 788,630.40 × 421,652.40
  4. Step 4: Simplify right side
    526,628.40x = 332,527,900,872.96
  5. Step 5: Solve for x
    x = 332,527,900,872.96/526,628.40
  6. Step 6: Final answer
    x = 631,427.97

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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.