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Finding the Fourth Proportional to 386,296.40, 579,444.60 and 372,299.60

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Solution

The fourth proportional to 386,296.40, 579,444.60 and 372,299.60 is: 558,449.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,296.40 : 579,444.60 = 372,299.60 : x
  2. Step 2: Convert to fraction form
    386,296.40/579,444.60 = 372,299.60/x
  3. Step 3: Cross multiply
    386,296.40x = 579,444.60 × 372,299.60
  4. Step 4: Simplify right side
    386,296.40x = 215,726,992,802.16
  5. Step 5: Solve for x
    x = 215,726,992,802.16/386,296.40
  6. Step 6: Final answer
    x = 558,449.40

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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.