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Finding the Fourth Proportional to 440,490.90, 660,736.35 and 386,253.30

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Solution

The fourth proportional to 440,490.90, 660,736.35 and 386,253.30 is: 579,379.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    440,490.90 : 660,736.35 = 386,253.30 : x
  2. Step 2: Convert to fraction form
    440,490.90/660,736.35 = 386,253.30/x
  3. Step 3: Cross multiply
    440,490.90x = 660,736.35 × 386,253.30
  4. Step 4: Simplify right side
    440,490.90x = 255,211,595,617.46
  5. Step 5: Solve for x
    x = 255,211,595,617.46/440,490.90
  6. Step 6: Final answer
    x = 579,379.95

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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.