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Finding the Fourth Proportional to 320,000.40, 478,834.20 and 292,006.80

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Solution

The fourth proportional to 320,000.40, 478,834.20 and 292,006.80 is: 436,945.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,000.40 : 478,834.20 = 292,006.80 : x
  2. Step 2: Convert to fraction form
    320,000.40/478,834.20 = 292,006.80/x
  3. Step 3: Cross multiply
    320,000.40x = 478,834.20 × 292,006.80
  4. Step 4: Simplify right side
    320,000.40x = 139,822,842,472.56
  5. Step 5: Solve for x
    x = 139,822,842,472.56/320,000.40
  6. Step 6: Final answer
    x = 436,945.84

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1.5x scale

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.