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Finding the Fourth Proportional to 644,697,105.23, 889,673,494.80 and 358,586,702.03

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Solution

The fourth proportional to 644,697,105.23, 889,673,494.80 and 358,586,702.03 is: 494,844,915.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,697,105.23 : 889,673,494.80 = 358,586,702.03 : x
  2. Step 2: Convert to fraction form
    644,697,105.23/889,673,494.80 = 358,586,702.03/x
  3. Step 3: Cross multiply
    644,697,105.23x = 889,673,494.80 × 358,586,702.03
  4. Step 4: Simplify right side
    644,697,105.23x = 319,025,084,377,595,008
  5. Step 5: Solve for x
    x = 319,025,084,377,595,008/644,697,105.23
  6. Step 6: Final answer
    x = 494,844,915.22

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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.