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Finding the Fourth Proportional to 318,368.40, 439,339.32 and 173,169.60

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Solution

The fourth proportional to 318,368.40, 439,339.32 and 173,169.60 is: 238,969.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,368.40 : 439,339.32 = 173,169.60 : x
  2. Step 2: Convert to fraction form
    318,368.40/439,339.32 = 173,169.60/x
  3. Step 3: Cross multiply
    318,368.40x = 439,339.32 × 173,169.60
  4. Step 4: Simplify right side
    318,368.40x = 76,080,214,308.67
  5. Step 5: Solve for x
    x = 76,080,214,308.67/318,368.40
  6. Step 6: Final answer
    x = 238,969.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.