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Finding the Fourth Proportional to 639,362.76, 882,318.76 and 352,880.80

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Solution

The fourth proportional to 639,362.76, 882,318.76 and 352,880.80 is: 486,974.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,362.76 : 882,318.76 = 352,880.80 : x
  2. Step 2: Convert to fraction form
    639,362.76/882,318.76 = 352,880.80/x
  3. Step 3: Cross multiply
    639,362.76x = 882,318.76 × 352,880.80
  4. Step 4: Simplify right side
    639,362.76x = 311,353,349,883.81
  5. Step 5: Solve for x
    x = 311,353,349,883.81/639,362.76
  6. Step 6: Final answer
    x = 486,974.48

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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.