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Finding the Fourth Proportional to 355,427.69, 530,871.72 and 321,641.33

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Solution

The fourth proportional to 355,427.69, 530,871.72 and 321,641.33 is: 480,407.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,427.69 : 530,871.72 = 321,641.33 : x
  2. Step 2: Convert to fraction form
    355,427.69/530,871.72 = 321,641.33/x
  3. Step 3: Cross multiply
    355,427.69x = 530,871.72 × 321,641.33
  4. Step 4: Simplify right side
    355,427.69x = 170,750,282,219.67
  5. Step 5: Solve for x
    x = 170,750,282,219.67/355,427.69
  6. Step 6: Final answer
    x = 480,407.94

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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.