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Finding the Fourth Proportional to 400,121.70, 561,103.50 and 400,121.70

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Solution

The fourth proportional to 400,121.70, 561,103.50 and 400,121.70 is: 561,103.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,121.70 : 561,103.50 = 400,121.70 : x
  2. Step 2: Convert to fraction form
    400,121.70/561,103.50 = 400,121.70/x
  3. Step 3: Cross multiply
    400,121.70x = 561,103.50 × 400,121.70
  4. Step 4: Simplify right side
    400,121.70x = 224,509,686,295.95
  5. Step 5: Solve for x
    x = 224,509,686,295.95/400,121.70
  6. Step 6: Final answer
    x = 561,103.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.