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Finding the Fourth Proportional to 615,400.70, 922,582.65 and 319,912.70

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Solution

The fourth proportional to 615,400.70, 922,582.65 and 319,912.70 is: 479,599.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,400.70 : 922,582.65 = 319,912.70 : x
  2. Step 2: Convert to fraction form
    615,400.70/922,582.65 = 319,912.70/x
  3. Step 3: Cross multiply
    615,400.70x = 922,582.65 × 319,912.70
  4. Step 4: Simplify right side
    615,400.70x = 295,145,906,534.66
  5. Step 5: Solve for x
    x = 295,145,906,534.66/615,400.70
  6. Step 6: Final answer
    x = 479,599.56

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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.