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Finding the Fourth Proportional to 644,501.58, 889,387.46 and 358,039.68

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Solution

The fourth proportional to 644,501.58, 889,387.46 and 358,039.68 is: 494,081.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,501.58 : 889,387.46 = 358,039.68 : x
  2. Step 2: Convert to fraction form
    644,501.58/889,387.46 = 358,039.68/x
  3. Step 3: Cross multiply
    644,501.58x = 889,387.46 × 358,039.68
  4. Step 4: Simplify right side
    644,501.58x = 318,436,001,574.41
  5. Step 5: Solve for x
    x = 318,436,001,574.41/644,501.58
  6. Step 6: Final answer
    x = 494,081.03

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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.