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Finding the Fourth Proportional to 315,305.46, 472,703.04 and 215,213.76

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Solution

The fourth proportional to 315,305.46, 472,703.04 and 215,213.76 is: 322,646.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,305.46 : 472,703.04 = 215,213.76 : x
  2. Step 2: Convert to fraction form
    315,305.46/472,703.04 = 215,213.76/x
  3. Step 3: Cross multiply
    315,305.46x = 472,703.04 × 215,213.76
  4. Step 4: Simplify right side
    315,305.46x = 101,732,198,601.83
  5. Step 5: Solve for x
    x = 101,732,198,601.83/315,305.46
  6. Step 6: Final answer
    x = 322,646.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.