Home / 644,755.20-889,486.23-402,617.37

Finding the Fourth Proportional to 644,755.20, 889,486.23 and 402,617.37

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Solution

The fourth proportional to 644,755.20, 889,486.23 and 402,617.37 is: 555,439.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,755.20 : 889,486.23 = 402,617.37 : x
  2. Step 2: Convert to fraction form
    644,755.20/889,486.23 = 402,617.37/x
  3. Step 3: Cross multiply
    644,755.20x = 889,486.23 × 402,617.37
  4. Step 4: Simplify right side
    644,755.20x = 358,122,606,573.82
  5. Step 5: Solve for x
    x = 358,122,606,573.82/644,755.20
  6. Step 6: Final answer
    x = 555,439.66

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1.5x scale

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.