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Finding the Fourth Proportional to 520,090.40, 780,135.60 and 340,464.80

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Solution

The fourth proportional to 520,090.40, 780,135.60 and 340,464.80 is: 510,697.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,090.40 : 780,135.60 = 340,464.80 : x
  2. Step 2: Convert to fraction form
    520,090.40/780,135.60 = 340,464.80/x
  3. Step 3: Cross multiply
    520,090.40x = 780,135.60 × 340,464.80
  4. Step 4: Simplify right side
    520,090.40x = 265,608,711,026.88
  5. Step 5: Solve for x
    x = 265,608,711,026.88/520,090.40
  6. Step 6: Final answer
    x = 510,697.20

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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.