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Finding the Fourth Proportional to 615,455.20, 922,664.40 and 319,967.20

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Solution

The fourth proportional to 615,455.20, 922,664.40 and 319,967.20 is: 479,681.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,455.20 : 922,664.40 = 319,967.20 : x
  2. Step 2: Convert to fraction form
    615,455.20/922,664.40 = 319,967.20/x
  3. Step 3: Cross multiply
    615,455.20x = 922,664.40 × 319,967.20
  4. Step 4: Simplify right side
    615,455.20x = 295,222,344,607.68
  5. Step 5: Solve for x
    x = 295,222,344,607.68/615,455.20
  6. Step 6: Final answer
    x = 479,681.29

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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.