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Finding the Fourth Proportional to 485,679.38, 670,237.54 and 284,475.38

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Solution

The fourth proportional to 485,679.38, 670,237.54 and 284,475.38 is: 392,576.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,679.38 : 670,237.54 = 284,475.38 : x
  2. Step 2: Convert to fraction form
    485,679.38/670,237.54 = 284,475.38/x
  3. Step 3: Cross multiply
    485,679.38x = 670,237.54 × 284,475.38
  4. Step 4: Simplify right side
    485,679.38x = 190,666,074,819.39
  5. Step 5: Solve for x
    x = 190,666,074,819.39/485,679.38
  6. Step 6: Final answer
    x = 392,576.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.