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Finding the Fourth Proportional to 644,265.09, 889,530.66 and 402,656.27

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Solution

The fourth proportional to 644,265.09, 889,530.66 and 402,656.27 is: 555,943.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,265.09 : 889,530.66 = 402,656.27 : x
  2. Step 2: Convert to fraction form
    644,265.09/889,530.66 = 402,656.27/x
  3. Step 3: Cross multiply
    644,265.09x = 889,530.66 × 402,656.27
  4. Step 4: Simplify right side
    644,265.09x = 358,175,093,158.59
  5. Step 5: Solve for x
    x = 358,175,093,158.59/644,265.09
  6. Step 6: Final answer
    x = 555,943.66

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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.