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Finding the Fourth Proportional to 644,280.68, 889,083 and 357,819.22

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Solution

The fourth proportional to 644,280.68, 889,083 and 357,819.22 is: 493,777.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,280.68 : 889,083 = 357,819.22 : x
  2. Step 2: Convert to fraction form
    644,280.68/889,083 = 357,819.22/x
  3. Step 3: Cross multiply
    644,280.68x = 889,083 × 357,819.22
  4. Step 4: Simplify right side
    644,280.68x = 318,130,985,575.26
  5. Step 5: Solve for x
    x = 318,130,985,575.26/644,280.68
  6. Step 6: Final answer
    x = 493,777.01

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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.