Home / 1,218,539.91-1,681,518.42-728,519.32

Finding the Fourth Proportional to 1,218,539.91, 1,681,518.42 and 728,519.32

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Solution

The fourth proportional to 1,218,539.91, 1,681,518.42 and 728,519.32 is: 1,005,316.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,218,539.91 : 1,681,518.42 = 728,519.32 : x
  2. Step 2: Convert to fraction form
    1,218,539.91/1,681,518.42 = 728,519.32/x
  3. Step 3: Cross multiply
    1,218,539.91x = 1,681,518.42 × 728,519.32
  4. Step 4: Simplify right side
    1,218,539.91x = 1,225,018,655,905.87
  5. Step 5: Solve for x
    x = 1,225,018,655,905.87/1,218,539.91
  6. Step 6: Final answer
    x = 1,005,316.81

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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.