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Finding the Fourth Proportional to 353,145.10, 528,508.05 and 213,004.30

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Solution

The fourth proportional to 353,145.10, 528,508.05 and 213,004.30 is: 318,776.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,145.10 : 528,508.05 = 213,004.30 : x
  2. Step 2: Convert to fraction form
    353,145.10/528,508.05 = 213,004.30/x
  3. Step 3: Cross multiply
    353,145.10x = 528,508.05 × 213,004.30
  4. Step 4: Simplify right side
    353,145.10x = 112,574,487,234.62
  5. Step 5: Solve for x
    x = 112,574,487,234.62/353,145.10
  6. Step 6: Final answer
    x = 318,776.86

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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.