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Finding the Fourth Proportional to 719,478.94, 992,889 and 397,189.24

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Solution

The fourth proportional to 719,478.94, 992,889 and 397,189.24 is: 548,125.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,478.94 : 992,889 = 397,189.24 : x
  2. Step 2: Convert to fraction form
    719,478.94/992,889 = 397,189.24/x
  3. Step 3: Cross multiply
    719,478.94x = 992,889 × 397,189.24
  4. Step 4: Simplify right side
    719,478.94x = 394,364,827,314.36
  5. Step 5: Solve for x
    x = 394,364,827,314.36/719,478.94
  6. Step 6: Final answer
    x = 548,125.60

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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.