Home / 428,625.30-641,676.70-286,117.10

Finding the Fourth Proportional to 428,625.30, 641,676.70 and 286,117.10

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Solution

The fourth proportional to 428,625.30, 641,676.70 and 286,117.10 is: 428,333.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,625.30 : 641,676.70 = 286,117.10 : x
  2. Step 2: Convert to fraction form
    428,625.30/641,676.70 = 286,117.10/x
  3. Step 3: Cross multiply
    428,625.30x = 641,676.70 × 286,117.10
  4. Step 4: Simplify right side
    428,625.30x = 183,594,676,541.57
  5. Step 5: Solve for x
    x = 183,594,676,541.57/428,625.30
  6. Step 6: Final answer
    x = 428,333.74

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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.