Home / 428,762.28-643,148.85-162,451.26

Finding the Fourth Proportional to 428,762.28, 643,148.85 and 162,451.26

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Solution

The fourth proportional to 428,762.28, 643,148.85 and 162,451.26 is: 243,678.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,762.28 : 643,148.85 = 162,451.26 : x
  2. Step 2: Convert to fraction form
    428,762.28/643,148.85 = 162,451.26/x
  3. Step 3: Cross multiply
    428,762.28x = 643,148.85 × 162,451.26
  4. Step 4: Simplify right side
    428,762.28x = 104,480,341,050.05
  5. Step 5: Solve for x
    x = 104,480,341,050.05/428,762.28
  6. Step 6: Final answer
    x = 243,678.95

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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.