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Finding the Fourth Proportional to 390,613.73, 585,916.34 and 296,422.34

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Solution

The fourth proportional to 390,613.73, 585,916.34 and 296,422.34 is: 444,630.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,613.73 : 585,916.34 = 296,422.34 : x
  2. Step 2: Convert to fraction form
    390,613.73/585,916.34 = 296,422.34/x
  3. Step 3: Cross multiply
    390,613.73x = 585,916.34 × 296,422.34
  4. Step 4: Simplify right side
    390,613.73x = 173,678,688,135.34
  5. Step 5: Solve for x
    x = 173,678,688,135.34/390,613.73
  6. Step 6: Final answer
    x = 444,630.28

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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.