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Finding the Fourth Proportional to 1,079,766.40, 1,619,726.40 and 331,811.20

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Solution

The fourth proportional to 1,079,766.40, 1,619,726.40 and 331,811.20 is: 497,740.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,079,766.40 : 1,619,726.40 = 331,811.20 : x
  2. Step 2: Convert to fraction form
    1,079,766.40/1,619,726.40 = 331,811.20/x
  3. Step 3: Cross multiply
    1,079,766.40x = 1,619,726.40 × 331,811.20
  4. Step 4: Simplify right side
    1,079,766.40x = 537,443,360,455.68
  5. Step 5: Solve for x
    x = 537,443,360,455.68/1,079,766.40
  6. Step 6: Final answer
    x = 497,740.40

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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.