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Finding the Fourth Proportional to 390,786.24, 585,873.13 and 154,305.93

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Solution

The fourth proportional to 390,786.24, 585,873.13 and 154,305.93 is: 231,337.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,786.24 : 585,873.13 = 154,305.93 : x
  2. Step 2: Convert to fraction form
    390,786.24/585,873.13 = 154,305.93/x
  3. Step 3: Cross multiply
    390,786.24x = 585,873.13 × 154,305.93
  4. Step 4: Simplify right side
    390,786.24x = 90,403,698,186.66
  5. Step 5: Solve for x
    x = 90,403,698,186.66/390,786.24
  6. Step 6: Final answer
    x = 231,337.98

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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.