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Finding the Fourth Proportional to 644,313.64, 889,597.62 and 402,704.80

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Solution

The fourth proportional to 644,313.64, 889,597.62 and 402,704.80 is: 556,010.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,313.64 : 889,597.62 = 402,704.80 : x
  2. Step 2: Convert to fraction form
    644,313.64/889,597.62 = 402,704.80/x
  3. Step 3: Cross multiply
    644,313.64x = 889,597.62 × 402,704.80
  4. Step 4: Simplify right side
    644,313.64x = 358,245,231,642.58
  5. Step 5: Solve for x
    x = 358,245,231,642.58/644,313.64
  6. Step 6: Final answer
    x = 556,010.63

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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.