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Finding the Fourth Proportional to 301,728.40, 421,866.80 and 301,728.40

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Solution

The fourth proportional to 301,728.40, 421,866.80 and 301,728.40 is: 421,866.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    301,728.40 : 421,866.80 = 301,728.40 : x
  2. Step 2: Convert to fraction form
    301,728.40/421,866.80 = 301,728.40/x
  3. Step 3: Cross multiply
    301,728.40x = 421,866.80 × 301,728.40
  4. Step 4: Simplify right side
    301,728.40x = 127,289,194,577.12
  5. Step 5: Solve for x
    x = 127,289,194,577.12/301,728.40
  6. Step 6: Final answer
    x = 421,866.80

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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.