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Finding the Fourth Proportional to 656,866.28, 906,474.84 and 355,060.28

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Solution

The fourth proportional to 656,866.28, 906,474.84 and 355,060.28 is: 489,982.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,866.28 : 906,474.84 = 355,060.28 : x
  2. Step 2: Convert to fraction form
    656,866.28/906,474.84 = 355,060.28/x
  3. Step 3: Cross multiply
    656,866.28x = 906,474.84 × 355,060.28
  4. Step 4: Simplify right side
    656,866.28x = 321,853,210,503.36
  5. Step 5: Solve for x
    x = 321,853,210,503.36/656,866.28
  6. Step 6: Final answer
    x = 489,982.85

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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.