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Finding the Fourth Proportional to 644,702.35, 889,653.02 and 386,450.07

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Solution

The fourth proportional to 644,702.35, 889,653.02 and 386,450.07 is: 533,279.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,702.35 : 889,653.02 = 386,450.07 : x
  2. Step 2: Convert to fraction form
    644,702.35/889,653.02 = 386,450.07/x
  3. Step 3: Cross multiply
    644,702.35x = 889,653.02 × 386,450.07
  4. Step 4: Simplify right side
    644,702.35x = 343,806,472,820.84
  5. Step 5: Solve for x
    x = 343,806,472,820.84/644,702.35
  6. Step 6: Final answer
    x = 533,279.39

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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.