Home / 1,392,678.72-1,921,877.28-772,464.96

Finding the Fourth Proportional to 1,392,678.72, 1,921,877.28 and 772,464.96

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Solution

The fourth proportional to 1,392,678.72, 1,921,877.28 and 772,464.96 is: 1,065,990.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,392,678.72 : 1,921,877.28 = 772,464.96 : x
  2. Step 2: Convert to fraction form
    1,392,678.72/1,921,877.28 = 772,464.96/x
  3. Step 3: Cross multiply
    1,392,678.72x = 1,921,877.28 × 772,464.96
  4. Step 4: Simplify right side
    1,392,678.72x = 1,484,582,856,220.11
  5. Step 5: Solve for x
    x = 1,484,582,856,220.11/1,392,678.72
  6. Step 6: Final answer
    x = 1,065,990.91

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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.