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Finding the Fourth Proportional to 644,281.16, 889,552.80 and 402,672.33

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Solution

The fourth proportional to 644,281.16, 889,552.80 and 402,672.33 is: 555,965.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,281.16 : 889,552.80 = 402,672.33 : x
  2. Step 2: Convert to fraction form
    644,281.16/889,552.80 = 402,672.33/x
  3. Step 3: Cross multiply
    644,281.16x = 889,552.80 × 402,672.33
  4. Step 4: Simplify right side
    644,281.16x = 358,198,298,634.02
  5. Step 5: Solve for x
    x = 358,198,298,634.02/644,281.16
  6. Step 6: Final answer
    x = 555,965.82

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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.