Home / 644,319.39-889,162.83-357,839.47

Finding the Fourth Proportional to 644,319.39, 889,162.83 and 357,839.47

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Solution

The fourth proportional to 644,319.39, 889,162.83 and 357,839.47 is: 493,819.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,319.39 : 889,162.83 = 357,839.47 : x
  2. Step 2: Convert to fraction form
    644,319.39/889,162.83 = 357,839.47/x
  3. Step 3: Cross multiply
    644,319.39x = 889,162.83 × 357,839.47
  4. Step 4: Simplify right side
    644,319.39x = 318,177,555,830.90
  5. Step 5: Solve for x
    x = 318,177,555,830.90/644,319.39
  6. Step 6: Final answer
    x = 493,819.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.