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Finding the Fourth Proportional to 353,889.90, 530,831.55 and 143,477.82

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Solution

The fourth proportional to 353,889.90, 530,831.55 and 143,477.82 is: 215,215.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,889.90 : 530,831.55 = 143,477.82 : x
  2. Step 2: Convert to fraction form
    353,889.90/530,831.55 = 143,477.82/x
  3. Step 3: Cross multiply
    353,889.90x = 530,831.55 × 143,477.82
  4. Step 4: Simplify right side
    353,889.90x = 76,162,553,581.22
  5. Step 5: Solve for x
    x = 76,162,553,581.22/353,889.90
  6. Step 6: Final answer
    x = 215,215.39

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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.