Home / 428,835.62-642,441.50-286,250.96

Finding the Fourth Proportional to 428,835.62, 642,441.50 and 286,250.96

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Solution

The fourth proportional to 428,835.62, 642,441.50 and 286,250.96 is: 428,834.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,835.62 : 642,441.50 = 286,250.96 : x
  2. Step 2: Convert to fraction form
    428,835.62/642,441.50 = 286,250.96/x
  3. Step 3: Cross multiply
    428,835.62x = 642,441.50 × 286,250.96
  4. Step 4: Simplify right side
    428,835.62x = 183,899,498,172.21
  5. Step 5: Solve for x
    x = 183,899,498,172.21/428,835.62
  6. Step 6: Final answer
    x = 428,834.48

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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.