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Finding the Fourth Proportional to 353,508.57, 487,590.03 and 217,364.31

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Solution

The fourth proportional to 353,508.57, 487,590.03 and 217,364.31 is: 299,807.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,508.57 : 487,590.03 = 217,364.31 : x
  2. Step 2: Convert to fraction form
    353,508.57/487,590.03 = 217,364.31/x
  3. Step 3: Cross multiply
    353,508.57x = 487,590.03 × 217,364.31
  4. Step 4: Simplify right side
    353,508.57x = 105,984,670,433.83
  5. Step 5: Solve for x
    x = 105,984,670,433.83/353,508.57
  6. Step 6: Final answer
    x = 299,807.92

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.