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Finding the Fourth Proportional to 779,719.80, 1,169,749.80 and 442,921.80

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Solution

The fourth proportional to 779,719.80, 1,169,749.80 and 442,921.80 is: 664,479.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    779,719.80 : 1,169,749.80 = 442,921.80 : x
  2. Step 2: Convert to fraction form
    779,719.80/1,169,749.80 = 442,921.80/x
  3. Step 3: Cross multiply
    779,719.80x = 1,169,749.80 × 442,921.80
  4. Step 4: Simplify right side
    779,719.80x = 518,107,686,965.64
  5. Step 5: Solve for x
    x = 518,107,686,965.64/779,719.80
  6. Step 6: Final answer
    x = 664,479.33

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.