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Finding the Fourth Proportional to 716,464.88, 988,721.51 and 394,168.07

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Solution

The fourth proportional to 716,464.88, 988,721.51 and 394,168.07 is: 543,951.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,464.88 : 988,721.51 = 394,168.07 : x
  2. Step 2: Convert to fraction form
    716,464.88/988,721.51 = 394,168.07/x
  3. Step 3: Cross multiply
    716,464.88x = 988,721.51 × 394,168.07
  4. Step 4: Simplify right side
    716,464.88x = 389,722,444,178.35
  5. Step 5: Solve for x
    x = 389,722,444,178.35/716,464.88
  6. Step 6: Final answer
    x = 543,951.91

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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.