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Finding the Fourth Proportional to 460,915.80, 691,406.10 and 261,331.80

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Solution

The fourth proportional to 460,915.80, 691,406.10 and 261,331.80 is: 392,016.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    460,915.80 : 691,406.10 = 261,331.80 : x
  2. Step 2: Convert to fraction form
    460,915.80/691,406.10 = 261,331.80/x
  3. Step 3: Cross multiply
    460,915.80x = 691,406.10 × 261,331.80
  4. Step 4: Simplify right side
    460,915.80x = 180,686,400,643.98
  5. Step 5: Solve for x
    x = 180,686,400,643.98/460,915.80
  6. Step 6: Final answer
    x = 392,016.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.