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Finding the Fourth Proportional to 636,808.40, 878,789.28 and 350,328.80

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Solution

The fourth proportional to 636,808.40, 878,789.28 and 350,328.80 is: 483,450.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,808.40 : 878,789.28 = 350,328.80 : x
  2. Step 2: Convert to fraction form
    636,808.40/878,789.28 = 350,328.80/x
  3. Step 3: Cross multiply
    636,808.40x = 878,789.28 × 350,328.80
  4. Step 4: Simplify right side
    636,808.40x = 307,865,193,915.26
  5. Step 5: Solve for x
    x = 307,865,193,915.26/636,808.40
  6. Step 6: Final answer
    x = 483,450.27

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1.5x scale

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.