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Finding the Fourth Proportional to 719,424.16, 992,807.72 and 397,133.49

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Solution

The fourth proportional to 719,424.16, 992,807.72 and 397,133.49 is: 548,045.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,424.16 : 992,807.72 = 397,133.49 : x
  2. Step 2: Convert to fraction form
    719,424.16/992,807.72 = 397,133.49/x
  3. Step 3: Cross multiply
    719,424.16x = 992,807.72 × 397,133.49
  4. Step 4: Simplify right side
    719,424.16x = 394,277,189,033.85
  5. Step 5: Solve for x
    x = 394,277,189,033.85/719,424.16
  6. Step 6: Final answer
    x = 548,045.52

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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.