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Finding the Fourth Proportional to 338,399.40, 507,599.10 and 279,301.80

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Solution

The fourth proportional to 338,399.40, 507,599.10 and 279,301.80 is: 418,952.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,399.40 : 507,599.10 = 279,301.80 : x
  2. Step 2: Convert to fraction form
    338,399.40/507,599.10 = 279,301.80/x
  3. Step 3: Cross multiply
    338,399.40x = 507,599.10 × 279,301.80
  4. Step 4: Simplify right side
    338,399.40x = 141,773,342,308.38
  5. Step 5: Solve for x
    x = 141,773,342,308.38/338,399.40
  6. Step 6: Final answer
    x = 418,952.70

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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.