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Finding the Fourth Proportional to 719,340.40, 992,713.80 and 392,672.80

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Solution

The fourth proportional to 719,340.40, 992,713.80 and 392,672.80 is: 541,901.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,340.40 : 992,713.80 = 392,672.80 : x
  2. Step 2: Convert to fraction form
    719,340.40/992,713.80 = 392,672.80/x
  3. Step 3: Cross multiply
    719,340.40x = 992,713.80 × 392,672.80
  4. Step 4: Simplify right side
    719,340.40x = 389,811,707,444.64
  5. Step 5: Solve for x
    x = 389,811,707,444.64/719,340.40
  6. Step 6: Final answer
    x = 541,901.59

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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.