Home / 639,385.10-882,288.63-352,886.69

Finding the Fourth Proportional to 639,385.10, 882,288.63 and 352,886.69

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Solution

The fourth proportional to 639,385.10, 882,288.63 and 352,886.69 is: 486,948.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,385.10 : 882,288.63 = 352,886.69 : x
  2. Step 2: Convert to fraction form
    639,385.10/882,288.63 = 352,886.69/x
  3. Step 3: Cross multiply
    639,385.10x = 882,288.63 × 352,886.69
  4. Step 4: Simplify right side
    639,385.10x = 311,347,914,265.34
  5. Step 5: Solve for x
    x = 311,347,914,265.34/639,385.10
  6. Step 6: Final answer
    x = 486,948.97

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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.