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Finding the Fourth Proportional to 520,038.30, 780,057.45 and 126,054.30

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Solution

The fourth proportional to 520,038.30, 780,057.45 and 126,054.30 is: 189,081.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,038.30 : 780,057.45 = 126,054.30 : x
  2. Step 2: Convert to fraction form
    520,038.30/780,057.45 = 126,054.30/x
  3. Step 3: Cross multiply
    520,038.30x = 780,057.45 × 126,054.30
  4. Step 4: Simplify right side
    520,038.30x = 98,329,595,819.54
  5. Step 5: Solve for x
    x = 98,329,595,819.54/520,038.30
  6. Step 6: Final answer
    x = 189,081.45

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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.