Home / 1,218,723.81-1,681,721.51-728,596.46

Finding the Fourth Proportional to 1,218,723.81, 1,681,721.51 and 728,596.46

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Solution

The fourth proportional to 1,218,723.81, 1,681,721.51 and 728,596.46 is: 1,005,392.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,218,723.81 : 1,681,721.51 = 728,596.46 : x
  2. Step 2: Convert to fraction form
    1,218,723.81/1,681,721.51 = 728,596.46/x
  3. Step 3: Cross multiply
    1,218,723.81x = 1,681,721.51 × 728,596.46
  4. Step 4: Simplify right side
    1,218,723.81x = 1,225,296,326,840.26
  5. Step 5: Solve for x
    x = 1,225,296,326,840.26/1,218,723.81
  6. Step 6: Final answer
    x = 1,005,392.95

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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.