Home / 479,816.48-715,845.16-431,989.76

Finding the Fourth Proportional to 479,816.48, 715,845.16 and 431,989.76

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Solution

The fourth proportional to 479,816.48, 715,845.16 and 431,989.76 is: 644,491.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,816.48 : 715,845.16 = 431,989.76 : x
  2. Step 2: Convert to fraction form
    479,816.48/715,845.16 = 431,989.76/x
  3. Step 3: Cross multiply
    479,816.48x = 715,845.16 × 431,989.76
  4. Step 4: Simplify right side
    479,816.48x = 309,237,778,865.56
  5. Step 5: Solve for x
    x = 309,237,778,865.56/479,816.48
  6. Step 6: Final answer
    x = 644,491.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.