Home / 428,933.60-643,400.40-296,223.20

Finding the Fourth Proportional to 428,933.60, 643,400.40 and 296,223.20

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Solution

The fourth proportional to 428,933.60, 643,400.40 and 296,223.20 is: 444,334.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,933.60 : 643,400.40 = 296,223.20 : x
  2. Step 2: Convert to fraction form
    428,933.60/643,400.40 = 296,223.20/x
  3. Step 3: Cross multiply
    428,933.60x = 643,400.40 × 296,223.20
  4. Step 4: Simplify right side
    428,933.60x = 190,590,125,369.28
  5. Step 5: Solve for x
    x = 190,590,125,369.28/428,933.60
  6. Step 6: Final answer
    x = 444,334.80

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1.5x scale

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.