Home / 428,847.20-643,119.72-176,054.24

Finding the Fourth Proportional to 428,847.20, 643,119.72 and 176,054.24

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Solution

The fourth proportional to 428,847.20, 643,119.72 and 176,054.24 is: 264,019.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,847.20 : 643,119.72 = 176,054.24 : x
  2. Step 2: Convert to fraction form
    428,847.20/643,119.72 = 176,054.24/x
  3. Step 3: Cross multiply
    428,847.20x = 643,119.72 × 176,054.24
  4. Step 4: Simplify right side
    428,847.20x = 113,223,953,533.61
  5. Step 5: Solve for x
    x = 113,223,953,533.61/428,847.20
  6. Step 6: Final answer
    x = 264,019.34

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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.