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Finding the Fourth Proportional to 254,462.60, 381,386.70 and 129,739.40

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Solution

The fourth proportional to 254,462.60, 381,386.70 and 129,739.40 is: 194,452.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    254,462.60 : 381,386.70 = 129,739.40 : x
  2. Step 2: Convert to fraction form
    254,462.60/381,386.70 = 129,739.40/x
  3. Step 3: Cross multiply
    254,462.60x = 381,386.70 × 129,739.40
  4. Step 4: Simplify right side
    254,462.60x = 49,480,881,625.98
  5. Step 5: Solve for x
    x = 49,480,881,625.98/254,462.60
  6. Step 6: Final answer
    x = 194,452.47

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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.