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Finding the Fourth Proportional to 644,513.80, 889,398.86 and 358,051.36

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Solution

The fourth proportional to 644,513.80, 889,398.86 and 358,051.36 is: 494,094.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,513.80 : 889,398.86 = 358,051.36 : x
  2. Step 2: Convert to fraction form
    644,513.80/889,398.86 = 358,051.36/x
  3. Step 3: Cross multiply
    644,513.80x = 889,398.86 × 358,051.36
  4. Step 4: Simplify right side
    644,513.80x = 318,450,471,405.45
  5. Step 5: Solve for x
    x = 318,450,471,405.45/644,513.80
  6. Step 6: Final answer
    x = 494,094.11

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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.