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Finding the Fourth Proportional to 485,910, 669,647.80 and 349,707.52

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Solution

The fourth proportional to 485,910, 669,647.80 and 349,707.52 is: 481,942.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,910 : 669,647.80 = 349,707.52 : x
  2. Step 2: Convert to fraction form
    485,910/669,647.80 = 349,707.52/x
  3. Step 3: Cross multiply
    485,910x = 669,647.80 × 349,707.52
  4. Step 4: Simplify right side
    485,910x = 234,180,871,411.46
  5. Step 5: Solve for x
    x = 234,180,871,411.46/485,910
  6. Step 6: Final answer
    x = 481,942.89

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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.