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Finding the Fourth Proportional to 1,199,929.06, 1,655,919.81 and 812,862.88

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Solution

The fourth proportional to 1,199,929.06, 1,655,919.81 and 812,862.88 is: 1,121,762.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,199,929.06 : 1,655,919.81 = 812,862.88 : x
  2. Step 2: Convert to fraction form
    1,199,929.06/1,655,919.81 = 812,862.88/x
  3. Step 3: Cross multiply
    1,199,929.06x = 1,655,919.81 × 812,862.88
  4. Step 4: Simplify right side
    1,199,929.06x = 1,346,035,745,805.65
  5. Step 5: Solve for x
    x = 1,346,035,745,805.65/1,199,929.06
  6. Step 6: Final answer
    x = 1,121,762.77

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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.