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Finding the Fourth Proportional to 318,300.10, 477,450.25 and 81,642.77

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Solution

The fourth proportional to 318,300.10, 477,450.25 and 81,642.77 is: 122,464.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,300.10 : 477,450.25 = 81,642.77 : x
  2. Step 2: Convert to fraction form
    318,300.10/477,450.25 = 81,642.77/x
  3. Step 3: Cross multiply
    318,300.10x = 477,450.25 × 81,642.77
  4. Step 4: Simplify right side
    318,300.10x = 38,980,360,146.27
  5. Step 5: Solve for x
    x = 38,980,360,146.27/318,300.10
  6. Step 6: Final answer
    x = 122,464.18

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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.