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Finding the Fourth Proportional to 644,740.92, 889,751.34 and 358,255.80

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Solution

The fourth proportional to 644,740.92, 889,751.34 and 358,255.80 is: 494,397.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,740.92 : 889,751.34 = 358,255.80 : x
  2. Step 2: Convert to fraction form
    644,740.92/889,751.34 = 358,255.80/x
  3. Step 3: Cross multiply
    644,740.92x = 889,751.34 × 358,255.80
  4. Step 4: Simplify right side
    644,740.92x = 318,758,578,112.77
  5. Step 5: Solve for x
    x = 318,758,578,112.77/644,740.92
  6. Step 6: Final answer
    x = 494,397.93

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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.