Home / 678,108.50-1,017,447.40-422,155.13

Finding the Fourth Proportional to 678,108.50, 1,017,447.40 and 422,155.13

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Solution

The fourth proportional to 678,108.50, 1,017,447.40 and 422,155.13 is: 633,409.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,108.50 : 1,017,447.40 = 422,155.13 : x
  2. Step 2: Convert to fraction form
    678,108.50/1,017,447.40 = 422,155.13/x
  3. Step 3: Cross multiply
    678,108.50x = 1,017,447.40 × 422,155.13
  4. Step 4: Simplify right side
    678,108.50x = 429,520,639,415.16
  5. Step 5: Solve for x
    x = 429,520,639,415.16/678,108.50
  6. Step 6: Final answer
    x = 633,409.90

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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.