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Finding the Fourth Proportional to 644,755.10, 889,695.77 and 403,064.26

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Solution

The fourth proportional to 644,755.10, 889,695.77 and 403,064.26 is: 556,187.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,755.10 : 889,695.77 = 403,064.26 : x
  2. Step 2: Convert to fraction form
    644,755.10/889,695.77 = 403,064.26/x
  3. Step 3: Cross multiply
    644,755.10x = 889,695.77 × 403,064.26
  4. Step 4: Simplify right side
    644,755.10x = 358,604,562,920.62
  5. Step 5: Solve for x
    x = 358,604,562,920.62/644,755.10
  6. Step 6: Final answer
    x = 556,187.25

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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.