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Finding the Fourth Proportional to 644,656.77, 889,610.36 and 358,177.55

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Solution

The fourth proportional to 644,656.77, 889,610.36 and 358,177.55 is: 494,276.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,656.77 : 889,610.36 = 358,177.55 : x
  2. Step 2: Convert to fraction form
    644,656.77/889,610.36 = 358,177.55/x
  3. Step 3: Cross multiply
    644,656.77x = 889,610.36 × 358,177.55
  4. Step 4: Simplify right side
    644,656.77x = 318,638,452,960.48
  5. Step 5: Solve for x
    x = 318,638,452,960.48/644,656.77
  6. Step 6: Final answer
    x = 494,276.13

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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.