Home / 428,623.27-641,673.63-286,115.07

Finding the Fourth Proportional to 428,623.27, 641,673.63 and 286,115.07

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Solution

The fourth proportional to 428,623.27, 641,673.63 and 286,115.07 is: 428,330.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,623.27 : 641,673.63 = 286,115.07 : x
  2. Step 2: Convert to fraction form
    428,623.27/641,673.63 = 286,115.07/x
  3. Step 3: Cross multiply
    428,623.27x = 641,673.63 × 286,115.07
  4. Step 4: Simplify right side
    428,623.27x = 183,592,495,564.60
  5. Step 5: Solve for x
    x = 183,592,495,564.60/428,623.27
  6. Step 6: Final answer
    x = 428,330.68

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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.