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Finding the Fourth Proportional to 520,911.80, 783,117.30 and 443,929.40

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Solution

The fourth proportional to 520,911.80, 783,117.30 and 443,929.40 is: 667,385.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,911.80 : 783,117.30 = 443,929.40 : x
  2. Step 2: Convert to fraction form
    520,911.80/783,117.30 = 443,929.40/x
  3. Step 3: Cross multiply
    520,911.80x = 783,117.30 × 443,929.40
  4. Step 4: Simplify right side
    520,911.80x = 347,648,793,118.62
  5. Step 5: Solve for x
    x = 347,648,793,118.62/520,911.80
  6. Step 6: Final answer
    x = 667,385.14

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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.