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Finding the Fourth Proportional to 639,407.05, 882,403.11 and 349,035.84

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Solution

The fourth proportional to 639,407.05, 882,403.11 and 349,035.84 is: 481,681.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,407.05 : 882,403.11 = 349,035.84 : x
  2. Step 2: Convert to fraction form
    639,407.05/882,403.11 = 349,035.84/x
  3. Step 3: Cross multiply
    639,407.05x = 882,403.11 × 349,035.84
  4. Step 4: Simplify right side
    639,407.05x = 307,990,310,717.46
  5. Step 5: Solve for x
    x = 307,990,310,717.46/639,407.05
  6. Step 6: Final answer
    x = 481,681.13

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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.