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Finding the Fourth Proportional to 656,354, 905,769 and 354,548

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Solution

The fourth proportional to 656,354, 905,769 and 354,548 is: 489,276.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,354 : 905,769 = 354,548 : x
  2. Step 2: Convert to fraction form
    656,354/905,769 = 354,548/x
  3. Step 3: Cross multiply
    656,354x = 905,769 × 354,548
  4. Step 4: Simplify right side
    656,354x = 321,138,587,412
  5. Step 5: Solve for x
    x = 321,138,587,412/656,354
  6. Step 6: Final answer
    x = 489,276.50

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.