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Finding the Fourth Proportional to 465,400.09, 642,182.16 and 261,411.94

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Solution

The fourth proportional to 465,400.09, 642,182.16 and 261,411.94 is: 360,709.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    465,400.09 : 642,182.16 = 261,411.94 : x
  2. Step 2: Convert to fraction form
    465,400.09/642,182.16 = 261,411.94/x
  3. Step 3: Cross multiply
    465,400.09x = 642,182.16 × 261,411.94
  4. Step 4: Simplify right side
    465,400.09x = 167,874,084,278.99
  5. Step 5: Solve for x
    x = 167,874,084,278.99/465,400.09
  6. Step 6: Final answer
    x = 360,709.18

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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.