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Finding the Fourth Proportional to 402,912.48, 556,007.60 and 221,624.40

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Solution

The fourth proportional to 402,912.48, 556,007.60 and 221,624.40 is: 305,835.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,912.48 : 556,007.60 = 221,624.40 : x
  2. Step 2: Convert to fraction form
    402,912.48/556,007.60 = 221,624.40/x
  3. Step 3: Cross multiply
    402,912.48x = 556,007.60 × 221,624.40
  4. Step 4: Simplify right side
    402,912.48x = 123,224,850,745.44
  5. Step 5: Solve for x
    x = 123,224,850,745.44/402,912.48
  6. Step 6: Final answer
    x = 305,835.28

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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.