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Finding the Fourth Proportional to 318,488.07, 477,732.14 and 81,830.76

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Solution

The fourth proportional to 318,488.07, 477,732.14 and 81,830.76 is: 122,746.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,488.07 : 477,732.14 = 81,830.76 : x
  2. Step 2: Convert to fraction form
    318,488.07/477,732.14 = 81,830.76/x
  3. Step 3: Cross multiply
    318,488.07x = 477,732.14 × 81,830.76
  4. Step 4: Simplify right side
    318,488.07x = 39,093,183,683.47
  5. Step 5: Solve for x
    x = 39,093,183,683.47/318,488.07
  6. Step 6: Final answer
    x = 122,746.15

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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.