Home / 693,640.60-1,039,769.70-319,010.20

Finding the Fourth Proportional to 693,640.60, 1,039,769.70 and 319,010.20

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Solution

The fourth proportional to 693,640.60, 1,039,769.70 and 319,010.20 is: 478,197.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    693,640.60 : 1,039,769.70 = 319,010.20 : x
  2. Step 2: Convert to fraction form
    693,640.60/1,039,769.70 = 319,010.20/x
  3. Step 3: Cross multiply
    693,640.60x = 1,039,769.70 × 319,010.20
  4. Step 4: Simplify right side
    693,640.60x = 331,697,139,950.94
  5. Step 5: Solve for x
    x = 331,697,139,950.94/693,640.60
  6. Step 6: Final answer
    x = 478,197.41

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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.