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Finding the Fourth Proportional to 390,411.36, 585,565.20 and 109,950.48

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Solution

The fourth proportional to 390,411.36, 585,565.20 and 109,950.48 is: 164,911.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,411.36 : 585,565.20 = 109,950.48 : x
  2. Step 2: Convert to fraction form
    390,411.36/585,565.20 = 109,950.48/x
  3. Step 3: Cross multiply
    390,411.36x = 585,565.20 × 109,950.48
  4. Step 4: Simplify right side
    390,411.36x = 64,383,174,811.30
  5. Step 5: Solve for x
    x = 64,383,174,811.30/390,411.36
  6. Step 6: Final answer
    x = 164,911.12

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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.