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Finding the Fourth Proportional to 285,438.40, 427,639.20 and 174,500.80

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Solution

The fourth proportional to 285,438.40, 427,639.20 and 174,500.80 is: 261,434.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,438.40 : 427,639.20 = 174,500.80 : x
  2. Step 2: Convert to fraction form
    285,438.40/427,639.20 = 174,500.80/x
  3. Step 3: Cross multiply
    285,438.40x = 427,639.20 × 174,500.80
  4. Step 4: Simplify right side
    285,438.40x = 74,623,382,511.36
  5. Step 5: Solve for x
    x = 74,623,382,511.36/285,438.40
  6. Step 6: Final answer
    x = 261,434.28

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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.