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Finding the Fourth Proportional to 390,105.79, 584,992.53 and 153,282.35

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Solution

The fourth proportional to 390,105.79, 584,992.53 and 153,282.35 is: 229,858.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,105.79 : 584,992.53 = 153,282.35 : x
  2. Step 2: Convert to fraction form
    390,105.79/584,992.53 = 153,282.35/x
  3. Step 3: Cross multiply
    390,105.79x = 584,992.53 × 153,282.35
  4. Step 4: Simplify right side
    390,105.79x = 89,669,029,730.85
  5. Step 5: Solve for x
    x = 89,669,029,730.85/390,105.79
  6. Step 6: Final answer
    x = 229,858.24

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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.