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Finding the Fourth Proportional to 615,331.20, 922,478.40 and 319,843.20

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Solution

The fourth proportional to 615,331.20, 922,478.40 and 319,843.20 is: 479,495.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,331.20 : 922,478.40 = 319,843.20 : x
  2. Step 2: Convert to fraction form
    615,331.20/922,478.40 = 319,843.20/x
  3. Step 3: Cross multiply
    615,331.20x = 922,478.40 × 319,843.20
  4. Step 4: Simplify right side
    615,331.20x = 295,048,443,386.88
  5. Step 5: Solve for x
    x = 295,048,443,386.88/615,331.20
  6. Step 6: Final answer
    x = 479,495.34

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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.