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Finding the Fourth Proportional to 520,104.60, 780,156.90 and 146,127.60

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Solution

The fourth proportional to 520,104.60, 780,156.90 and 146,127.60 is: 219,191.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,104.60 : 780,156.90 = 146,127.60 : x
  2. Step 2: Convert to fraction form
    520,104.60/780,156.90 = 146,127.60/x
  3. Step 3: Cross multiply
    520,104.60x = 780,156.90 × 146,127.60
  4. Step 4: Simplify right side
    520,104.60x = 114,002,455,420.44
  5. Step 5: Solve for x
    x = 114,002,455,420.44/520,104.60
  6. Step 6: Final answer
    x = 219,191.40

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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.