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Finding the Fourth Proportional to 557,415.40, 836,123.10 and 520,090.60

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Solution

The fourth proportional to 557,415.40, 836,123.10 and 520,090.60 is: 780,135.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    557,415.40 : 836,123.10 = 520,090.60 : x
  2. Step 2: Convert to fraction form
    557,415.40/836,123.10 = 520,090.60/x
  3. Step 3: Cross multiply
    557,415.40x = 836,123.10 × 520,090.60
  4. Step 4: Simplify right side
    557,415.40x = 434,859,764,752.86
  5. Step 5: Solve for x
    x = 434,859,764,752.86/557,415.40
  6. Step 6: Final answer
    x = 780,135.90

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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.