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Finding the Fourth Proportional to 644,820.55, 889,950.44 and 464,130.61

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Solution

The fourth proportional to 644,820.55, 889,950.44 and 464,130.61 is: 640,570.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,820.55 : 889,950.44 = 464,130.61 : x
  2. Step 2: Convert to fraction form
    644,820.55/889,950.44 = 464,130.61/x
  3. Step 3: Cross multiply
    644,820.55x = 889,950.44 × 464,130.61
  4. Step 4: Simplify right side
    644,820.55x = 413,053,239,522.42
  5. Step 5: Solve for x
    x = 413,053,239,522.42/644,820.55
  6. Step 6: Final answer
    x = 640,570.84

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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.