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Finding the Fourth Proportional to 315,953.55, 435,885.34 and 220,516.11

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Solution

The fourth proportional to 315,953.55, 435,885.34 and 220,516.11 is: 304,221.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,953.55 : 435,885.34 = 220,516.11 : x
  2. Step 2: Convert to fraction form
    315,953.55/435,885.34 = 220,516.11/x
  3. Step 3: Cross multiply
    315,953.55x = 435,885.34 × 220,516.11
  4. Step 4: Simplify right side
    315,953.55x = 96,119,739,582.83
  5. Step 5: Solve for x
    x = 96,119,739,582.83/315,953.55
  6. Step 6: Final answer
    x = 304,221.11

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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.