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Finding the Fourth Proportional to 520,092.30, 780,138.45 and 380,124.30

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Solution

The fourth proportional to 520,092.30, 780,138.45 and 380,124.30 is: 570,186.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,092.30 : 780,138.45 = 380,124.30 : x
  2. Step 2: Convert to fraction form
    520,092.30/780,138.45 = 380,124.30/x
  3. Step 3: Cross multiply
    520,092.30x = 780,138.45 × 380,124.30
  4. Step 4: Simplify right side
    520,092.30x = 296,549,582,209.34
  5. Step 5: Solve for x
    x = 296,549,582,209.34/520,092.30
  6. Step 6: Final answer
    x = 570,186.45

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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.