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Finding the Fourth Proportional to 615,216.40, 922,824.60 and 438,069.40

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Solution

The fourth proportional to 615,216.40, 922,824.60 and 438,069.40 is: 657,104.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,216.40 : 922,824.60 = 438,069.40 : x
  2. Step 2: Convert to fraction form
    615,216.40/922,824.60 = 438,069.40/x
  3. Step 3: Cross multiply
    615,216.40x = 922,824.60 × 438,069.40
  4. Step 4: Simplify right side
    615,216.40x = 404,261,218,827.24
  5. Step 5: Solve for x
    x = 404,261,218,827.24/615,216.40
  6. Step 6: Final answer
    x = 657,104.10

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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.