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Finding the Fourth Proportional to 355,661.18, 531,220.38 and 321,875.42

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Solution

The fourth proportional to 355,661.18, 531,220.38 and 321,875.42 is: 480,757.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,661.18 : 531,220.38 = 321,875.42 : x
  2. Step 2: Convert to fraction form
    355,661.18/531,220.38 = 321,875.42/x
  3. Step 3: Cross multiply
    355,661.18x = 531,220.38 × 321,875.42
  4. Step 4: Simplify right side
    355,661.18x = 170,986,782,925.06
  5. Step 5: Solve for x
    x = 170,986,782,925.06/355,661.18
  6. Step 6: Final answer
    x = 480,757.51

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.