Home / 1,218,541.91-1,681,521.18-728,521.32

Finding the Fourth Proportional to 1,218,541.91, 1,681,521.18 and 728,521.32

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Solution

The fourth proportional to 1,218,541.91, 1,681,521.18 and 728,521.32 is: 1,005,319.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,218,541.91 : 1,681,521.18 = 728,521.32 : x
  2. Step 2: Convert to fraction form
    1,218,541.91/1,681,521.18 = 728,521.32/x
  3. Step 3: Cross multiply
    1,218,541.91x = 1,681,521.18 × 728,521.32
  4. Step 4: Simplify right side
    1,218,541.91x = 1,225,024,029,661.56
  5. Step 5: Solve for x
    x = 1,225,024,029,661.56/1,218,541.91
  6. Step 6: Final answer
    x = 1,005,319.57

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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.