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Finding the Fourth Proportional to 719,407.58, 992,782.65 and 397,117.90

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Solution

The fourth proportional to 719,407.58, 992,782.65 and 397,117.90 is: 548,022.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,407.58 : 992,782.65 = 397,117.90 : x
  2. Step 2: Convert to fraction form
    719,407.58/992,782.65 = 397,117.90/x
  3. Step 3: Cross multiply
    719,407.58x = 992,782.65 × 397,117.90
  4. Step 4: Simplify right side
    719,407.58x = 394,251,761,124.44
  5. Step 5: Solve for x
    x = 394,251,761,124.44/719,407.58
  6. Step 6: Final answer
    x = 548,022.81

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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.