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Finding the Fourth Proportional to 639,230, 882,155.36 and 352,768.20

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Solution

The fourth proportional to 639,230, 882,155.36 and 352,768.20 is: 486,830.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,230 : 882,155.36 = 352,768.20 : x
  2. Step 2: Convert to fraction form
    639,230/882,155.36 = 352,768.20/x
  3. Step 3: Cross multiply
    639,230x = 882,155.36 × 352,768.20
  4. Step 4: Simplify right side
    639,230x = 311,196,358,467.55
  5. Step 5: Solve for x
    x = 311,196,358,467.55/639,230
  6. Step 6: Final answer
    x = 486,830.03

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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.