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Finding the Fourth Proportional to 644,297.32, 889,150.64 and 386,089.16

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Solution

The fourth proportional to 644,297.32, 889,150.64 and 386,089.16 is: 532,815.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,297.32 : 889,150.64 = 386,089.16 : x
  2. Step 2: Convert to fraction form
    644,297.32/889,150.64 = 386,089.16/x
  3. Step 3: Cross multiply
    644,297.32x = 889,150.64 × 386,089.16
  4. Step 4: Simplify right side
    644,297.32x = 343,291,423,711.06
  5. Step 5: Solve for x
    x = 343,291,423,711.06/644,297.32
  6. Step 6: Final answer
    x = 532,815.23

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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.