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Finding the Fourth Proportional to 318,560.32, 439,604.40 and 180,764.34

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Solution

The fourth proportional to 318,560.32, 439,604.40 and 180,764.34 is: 249,449.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,560.32 : 439,604.40 = 180,764.34 : x
  2. Step 2: Convert to fraction form
    318,560.32/439,604.40 = 180,764.34/x
  3. Step 3: Cross multiply
    318,560.32x = 439,604.40 × 180,764.34
  4. Step 4: Simplify right side
    318,560.32x = 79,464,799,227.10
  5. Step 5: Solve for x
    x = 79,464,799,227.10/318,560.32
  6. Step 6: Final answer
    x = 249,449.77

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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.