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Finding the Fourth Proportional to 644,379.94, 889,219.56 and 357,918.28

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Solution

The fourth proportional to 644,379.94, 889,219.56 and 357,918.28 is: 493,913.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,379.94 : 889,219.56 = 357,918.28 : x
  2. Step 2: Convert to fraction form
    644,379.94/889,219.56 = 357,918.28/x
  3. Step 3: Cross multiply
    644,379.94x = 889,219.56 × 357,918.28
  4. Step 4: Simplify right side
    644,379.94x = 318,267,935,457.56
  5. Step 5: Solve for x
    x = 318,267,935,457.56/644,379.94
  6. Step 6: Final answer
    x = 493,913.48

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1.5x scale

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.