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Finding the Fourth Proportional to 644,281.81, 889,084.54 and 357,820.35

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Solution

The fourth proportional to 644,281.81, 889,084.54 and 357,820.35 is: 493,778.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,281.81 : 889,084.54 = 357,820.35 : x
  2. Step 2: Convert to fraction form
    644,281.81/889,084.54 = 357,820.35/x
  3. Step 3: Cross multiply
    644,281.81x = 889,084.54 × 357,820.35
  4. Step 4: Simplify right side
    644,281.81x = 318,132,541,282.39
  5. Step 5: Solve for x
    x = 318,132,541,282.39/644,281.81
  6. Step 6: Final answer
    x = 493,778.56

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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.