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Finding the Fourth Proportional to 390,501.39, 585,367.76 and 228,189.44

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Solution

The fourth proportional to 390,501.39, 585,367.76 and 228,189.44 is: 342,059.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,501.39 : 585,367.76 = 228,189.44 : x
  2. Step 2: Convert to fraction form
    390,501.39/585,367.76 = 228,189.44/x
  3. Step 3: Cross multiply
    390,501.39x = 585,367.76 × 228,189.44
  4. Step 4: Simplify right side
    390,501.39x = 133,574,742,967.31
  5. Step 5: Solve for x
    x = 133,574,742,967.31/390,501.39
  6. Step 6: Final answer
    x = 342,059.58

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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.