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Finding the Fourth Proportional to 339,920.10, 509,880.15 and 318,924.90

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Solution

The fourth proportional to 339,920.10, 509,880.15 and 318,924.90 is: 478,387.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,920.10 : 509,880.15 = 318,924.90 : x
  2. Step 2: Convert to fraction form
    339,920.10/509,880.15 = 318,924.90/x
  3. Step 3: Cross multiply
    339,920.10x = 509,880.15 × 318,924.90
  4. Step 4: Simplify right side
    339,920.10x = 162,613,475,850.74
  5. Step 5: Solve for x
    x = 162,613,475,850.74/339,920.10
  6. Step 6: Final answer
    x = 478,387.35

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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.