Home / 719,405.77-992,780.15-397,116.09

Finding the Fourth Proportional to 719,405.77, 992,780.15 and 397,116.09

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Solution

The fourth proportional to 719,405.77, 992,780.15 and 397,116.09 is: 548,020.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,405.77 : 992,780.15 = 397,116.09 : x
  2. Step 2: Convert to fraction form
    719,405.77/992,780.15 = 397,116.09/x
  3. Step 3: Cross multiply
    719,405.77x = 992,780.15 × 397,116.09
  4. Step 4: Simplify right side
    719,405.77x = 394,248,968,667.48
  5. Step 5: Solve for x
    x = 394,248,968,667.48/719,405.77
  6. Step 6: Final answer
    x = 548,020.30

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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.