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Finding the Fourth Proportional to 390,039.82, 584,992.83 and 123,740.98

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Solution

The fourth proportional to 390,039.82, 584,992.83 and 123,740.98 is: 185,590.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,039.82 : 584,992.83 = 123,740.98 : x
  2. Step 2: Convert to fraction form
    390,039.82/584,992.83 = 123,740.98/x
  3. Step 3: Cross multiply
    390,039.82x = 584,992.83 × 123,740.98
  4. Step 4: Simplify right side
    390,039.82x = 72,387,586,077.17
  5. Step 5: Solve for x
    x = 72,387,586,077.17/390,039.82
  6. Step 6: Final answer
    x = 185,590.25

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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.