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Finding the Fourth Proportional to 1,405,390.92, 1,939,440.08 and 760,811.10

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Solution

The fourth proportional to 1,405,390.92, 1,939,440.08 and 760,811.10 is: 1,049,919.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,405,390.92 : 1,939,440.08 = 760,811.10 : x
  2. Step 2: Convert to fraction form
    1,405,390.92/1,939,440.08 = 760,811.10/x
  3. Step 3: Cross multiply
    1,405,390.92x = 1,939,440.08 × 760,811.10
  4. Step 4: Simplify right side
    1,405,390.92x = 1,475,547,540,648.89
  5. Step 5: Solve for x
    x = 1,475,547,540,648.89/1,405,390.92
  6. Step 6: Final answer
    x = 1,049,919.65

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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.