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Finding the Fourth Proportional to 520,013.25, 780,019.88 and 126,029.25

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Solution

The fourth proportional to 520,013.25, 780,019.88 and 126,029.25 is: 189,043.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,013.25 : 780,019.88 = 126,029.25 : x
  2. Step 2: Convert to fraction form
    520,013.25/780,019.88 = 126,029.25/x
  3. Step 3: Cross multiply
    520,013.25x = 780,019.88 × 126,029.25
  4. Step 4: Simplify right side
    520,013.25x = 98,305,319,831.34
  5. Step 5: Solve for x
    x = 98,305,319,831.34/520,013.25
  6. Step 6: Final answer
    x = 189,043.88

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Similar ratio
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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.