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Finding the Fourth Proportional to 390,150.40, 585,225.60 and 109,667.65

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Solution

The fourth proportional to 390,150.40, 585,225.60 and 109,667.65 is: 164,501.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,150.40 : 585,225.60 = 109,667.65 : x
  2. Step 2: Convert to fraction form
    390,150.40/585,225.60 = 109,667.65/x
  3. Step 3: Cross multiply
    390,150.40x = 585,225.60 × 109,667.65
  4. Step 4: Simplify right side
    390,150.40x = 64,180,314,808.78
  5. Step 5: Solve for x
    x = 64,180,314,808.78/390,150.40
  6. Step 6: Final answer
    x = 164,501.47

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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.