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Finding the Fourth Proportional to 615,485.70, 922,710.15 and 319,997.70

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Solution

The fourth proportional to 615,485.70, 922,710.15 and 319,997.70 is: 479,727.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,485.70 : 922,710.15 = 319,997.70 : x
  2. Step 2: Convert to fraction form
    615,485.70/922,710.15 = 319,997.70/x
  3. Step 3: Cross multiply
    615,485.70x = 922,710.15 × 319,997.70
  4. Step 4: Simplify right side
    615,485.70x = 295,265,125,766.66
  5. Step 5: Solve for x
    x = 295,265,125,766.66/615,485.70
  6. Step 6: Final answer
    x = 479,727.03

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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.