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Finding the Fourth Proportional to 644,360.13, 889,217 and 357,906.87

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Solution

The fourth proportional to 644,360.13, 889,217 and 357,906.87 is: 493,911.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,360.13 : 889,217 = 357,906.87 : x
  2. Step 2: Convert to fraction form
    644,360.13/889,217 = 357,906.87/x
  3. Step 3: Cross multiply
    644,360.13x = 889,217 × 357,906.87
  4. Step 4: Simplify right side
    644,360.13x = 318,256,873,220.79
  5. Step 5: Solve for x
    x = 318,256,873,220.79/644,360.13
  6. Step 6: Final answer
    x = 493,911.49

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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.