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Finding the Fourth Proportional to 460,501.20, 690,751.80 and 128,077.20

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Solution

The fourth proportional to 460,501.20, 690,751.80 and 128,077.20 is: 192,115.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    460,501.20 : 690,751.80 = 128,077.20 : x
  2. Step 2: Convert to fraction form
    460,501.20/690,751.80 = 128,077.20/x
  3. Step 3: Cross multiply
    460,501.20x = 690,751.80 × 128,077.20
  4. Step 4: Simplify right side
    460,501.20x = 88,469,556,438.96
  5. Step 5: Solve for x
    x = 88,469,556,438.96/460,501.20
  6. Step 6: Final answer
    x = 192,115.80

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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.