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Finding the Fourth Proportional to 615,196.40, 922,940.40 and 315,723.20

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Solution

The fourth proportional to 615,196.40, 922,940.40 and 315,723.20 is: 473,659.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,196.40 : 922,940.40 = 315,723.20 : x
  2. Step 2: Convert to fraction form
    615,196.40/922,940.40 = 315,723.20/x
  3. Step 3: Cross multiply
    615,196.40x = 922,940.40 × 315,723.20
  4. Step 4: Simplify right side
    615,196.40x = 291,393,696,497.28
  5. Step 5: Solve for x
    x = 291,393,696,497.28/615,196.40
  6. Step 6: Final answer
    x = 473,659.63

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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.