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Finding the Fourth Proportional to 340,090.40, 510,135.60 and 287,602.40

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Solution

The fourth proportional to 340,090.40, 510,135.60 and 287,602.40 is: 431,403.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    340,090.40 : 510,135.60 = 287,602.40 : x
  2. Step 2: Convert to fraction form
    340,090.40/510,135.60 = 287,602.40/x
  3. Step 3: Cross multiply
    340,090.40x = 510,135.60 × 287,602.40
  4. Step 4: Simplify right side
    340,090.40x = 146,716,222,885.44
  5. Step 5: Solve for x
    x = 146,716,222,885.44/340,090.40
  6. Step 6: Final answer
    x = 431,403.60

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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.